Hi All,<BR><BR>Yesterday I tried to update my Beta 2 to ASP.NET V.1<BR>I uninstalled my Beta 2 Framework first but left my Beta 2 VS.NET installed, I then installed the ASP.NET V.1 and tried to run my application and it failed with the following error message.<BR><BR>========================<BR> Type 'LoginUser.LoginUser' is not defined<BR>========================<BR><BR>LoginUser is a class that worked before. I then opened up VS.NET to try and recompile the .Dll and came across a error saying something like 'could not convert licences.lscx to binary'.<BR><BR>So I renamed the licence file to .old and recompiled but still have the same problem. I then tried to edit a .aspx file to comment out that little piece of code and got the following error message.<BR><BR>======================<BR>The file failed to load in the Web Form designer. Please correct the following error, then load it again: Method not found: System.Object[] System.Runtime.InteropServices.Marshal.GetObjectsF orNativeVariants(IntPtr, Int32).<BR>======================<BR><BR>This is happening on all my files and I can't get anything to work.<BR><BR>I have tried re-installing the framework and Visual Studio but it still doesn't work<BR><BR>I am now stuck in the situation with The Beta 2 .NET framework installed but not active (because for some reason I can now not uninstall it?).<BR>The ASP.NET V.1 Framework installed and activated.<BR>And Visual Studio Beta 2 installed.<BR><BR>Please say someone out there knows how to fix this.<BR><BR>Thank You,<BR>Gavin MannionGavin, I have no idea what to do, to be honest. The Microsoft docs state: Important: Please remove all Beta versions of ASP.NET before installing Version 1. So that is likely the problem. I'd encourage you to ask this question on the following ListServ, which is commonly frequented by ASP.NET Team Members at Microsoft:<BR>http://www.aspfriends.com/aspfriends/aspngstart.asp