Dotnet installation issue

Hi experts, I'm developing a simple dotnet application using Visual Studio 2008 that I've installed here on webhost4life's server.

It runs fine on my local Dev environment of course but I get this error upon installation

http://www.virtassistant.com/knowledgemanager/default.aspx

I presume its something to do with the version of dotnet that I'm running but I have my .Net Framework set to 3.5 in the advanced compiler settings and that matches what Webhost4life claim.

When I suggested it was an error at the server end, I received this reply but I still have no idea to to fix this problem ...

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Hello,

Thank you for your patience.

Yes, .NET Framework version is installed on our platform upto 3.5. Also, I have check the website at the URL http://www.virtassistant.com/knowledgemanager/default.aspx and noticed that the website is loading with the error "Could not load file or assembly 'System.Data.DataSetExtensions' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded.". It appears to be the DLL files are not up to the .NET version 3.5. Hence, I suggest you to recompile the DLL files with the version 3.5 and re-upload to web directory and then check the website functionality from your end.

If you have any further questions, please update the Support Console.