Dec 22, 2009 07:50 PM|rsantos00|LINK
Well i resolved my problem, this way:
1) Go to dev machine (where everything work well)
2) Go to C:\Program Files\Microsoft SDKs\Silverlight\v2.0\Reference Assemblies
3) Copy the System.Core.dll and Syste,Core.xml to bin of web site in the server
Everything works fine now, i don't know why i need this, but i guess there is somewhere any reference to this assembly (my project don't have any silverligth app).
Anyway, if someone have the same error ...