Hello,

After installing Silverlight 1.0 or 1.1 in Windows Vista Business x64 I receive HTTP 400 Bad Request in many pages especially when I want to log in a Dlink DWL-2100 AP through the web-based interface.

This is not happening in x64 IE or another browser (in which silverlight is not intalled)...

Odd. Which version of Silverlight did you install, 1.0 or 1.1? If you uninstall Silverlight, does the problem resolve?

Pete

Silverlight.net Moderator
MVP: Silverlight
Silverlight Insider
POKE 53280,0 - My Blog at irritatedVowel.com

Odd indeed... Anyway I installed 1.0 and the problem appeared, I uninstalled it and the problem disappeared, I installed 1.1 and the problem appeared again and after uninstalling that the problem disappeared again!! The same thing is happening to my laptop which runs on Windows Xp pro x64. The issue seems to appead on silverlight when trying to enter on pages asking for authentication using the standard authentication popup dialogue (like iis standard authendication box)

I just had the exact same problem trying to access the D-link DWL-2100AP using XP PRO SP2 x86 and IE7.

as soon as I removed silverlight the issue disappeared

I

Same here - uninstalled Silverlight and I could access the D-LINK 2100AP - glad I found this or I would have returned the hardware!

I spent 8 hours today trying to figure out why I could not connect with our 5 Cayman 5346 routers.  I would sometimes get a login screen and the home page, but trying to move to any otyher page gave me the HTTP 400 error.  Netopia Tech support had no idea.  They used FireFox and could connect.  I downloaded fireFox and connected.  Since this seemed to be an IE issue, I considered what had been added recently to all of our enterprise computers via WSUS.  Silverlight stood out so I uninstalled it.  Behold, IE7 connects.  MS needs to figure out what is broke and fix it.

 I have the same problem and really hope they will fix this problem soon.  I can not view my dlink internet camera from my vista machine with silverlight installed.  The second it's uninstalled it connects just fine immediately.  Happens in both Silverlight 1 and 2.  Please fix!

Same here. Spent four hours trying to fix the Cayman 3546-002 problem while on the phone with AT&T tech. Found this page and it solved the problem. I uninstalled SilverLight and everything is back up and running. Thanks all of you for your help.

AT&T needs to know this problem exists.

Thanks!

I had to remove Silverlight from all my PC's it was causing 'http 400 bad request'

Windows XP SP2... IE 7

Greetings everyone.  Pardon the cross-post (post I made last night in the microsoft.public.internetexplorer.general Google Group), but I'm truely stuck.  I come to this thread for assistance, hopefully someone can point me in the right direction.

I've been having the same exact issue as the OP, BUT I've uninstalled Silverlight and still cannot see the DCS6620G in IE7.  I can pull it
up in FireFox and Safari using XP Home SP2 ilverlight (without any live streaming in either).

DLink, tech support was no help.
Uninstalling Silverlight was no help.
Uninstalled/Reinstalled IE7, no success
Cannot do a system restore.
No Viruses or Spyware.

Any assistance is greatly appreciated.

Many thanks!

I have had the same issue too.. took a long time to diagnose what it was, as I had installed Silverlight a couple of months ago, and hadn't had any other issues with it (that I know of) until I tried to look at the status of one of our Liebert UPS units. It has a hardware Web card (Liebert OpenComms Webcard) in it, so I guess it is doing something similar to the D-Link box mentioned in other posts.

I would get an HTTP 400 error if I went to the Liebert card's address, with Silverlight installed, but it worked fine after removing Silverlight.

I think it may have something to do with Javascript processing?  - As the first page from this Liebert card seems to try to use some Javascript to open the main visible frames... just a guess though.

Using XP Pro SP2 x86 with IE7.

"Me too".  Silverlight breaks the DLink line of IP Surveillance Cameras.  The web interface pages are 400 when Silverlight is installed.  Uninstall Silverlight and it magically works.  Install it again (latest version from Microsoft Update) and it breaks again.  There's no doubt Silverlight is the cause.  XP SP3 x86 32bit.

As an interesting note, there a couple of computers with Silverlight installed that *can* talk to the DLink cams without a 400 error!  Weird!  They are XP SP3 x86 32bit also.  I can't think of any differences other than perhaps the install order of SP3 vs some patches vs Silverlight.

I hope either MS or DLink will fix this!! 

Same problem here but discovered that a registry entry length was the cause.

 HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Accepted Documents

 Make sure the above entries do not combine to exceed 299 chars. (at least for my DLINK device)

 When it was at 300 chars or more got error 400.

When I changed it to 299 or less chars DLINK web interface worked fine.

 I guess most people are installing Silverlight and this is one of the few apps that actually modify this registry entry.

 See http://silverlight.net/forums/p/14834/77714.aspx#77714

Thanks, it works for my Cayman 3546-002 too!

 I installed Silverlight and once again the 'http 400 bad request' error occured

I went to:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Accepted Documents

The Accept line was up to 306 in length. I removed the "application/x-silverlight" application and everything is up and running.

 THANKS!

I'm really glad I found this page after only an hour of banging my head and turning off all forms of IE security.  I had the same problem with a D-Link DWL-7100AP.  Going to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Accepted Documents and removing the "application/x-silverlight" line worked for me.  Now, I just have to wonder what's going to happen the next time I hit a page using Silverlight!

For D-LINK DCS-6620G the 1.05 firmware (5 Aug 08) seems to fix it. (Silverlight 2.030523.8).

 Dear MBP, dear everyone!

I would like to thank all of you and especially MBP for excellent discovery. I had the same problem, but I had no neither silverlight nor DLink. But I have another devices with which I hade such problems. Actually this problem was as MBP discovers because of regitry settings. Althoug I don't use silverlight (at least right now) I decided to join to this forum/discussion and thank all of you.

Good luck!

Had this HTTP 400 problem for a long time everytime I was installing Silverlight i had to remove it to get rid of the problem.

When I finally installed silverlight 2.0 the HTTP 400 problem disappeared, I assume they msut have fixed somenthing in the new version of Silverlight.