Error Message upon opening a VB.NET Project

I have inherited a VB.NET project that uses eConnect to post transactions that are generated in another application. The previous developer is not available. My background is with C# but this project is written in VB.

My first task is to verify that I have all the components in the solution.

I am getting this error:

Error 1 Unable to open module file 'C:\Documents and Settings\devuser\Local Settings\Temp\1\.NETFramework,Version=v4.0.AssemblyAttributes.vb': The system cannot find the path specified.  C:\Documents and Settings\devuser\Local Settings\Temp\1\.NETFramework,Version=v4.0.AssemblyAttributes.vb 1 1 IntegrationTool

I get this even when logged in as the previous developer.  Is this project related?  Or permissions or user related?

Thanks for your help.