ssrs with business intelegence, compiling from AX

Hello,

when I am using SSRS with business intelegence, and compiling it from AX, I got a message:

MSB3270: There was a mismatch between the processor architecture of the project being built "MSIL" and the processor architecture of the reference "Microsoft.Dynamics.AX.ManagedInterop", "x86". This mismatch may cause runtime failures. Please consider changing \C:\Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.Common.targets 1578 1 Err:178

I don't know whether this is related, but every time, I add new project in VS, it is default framework 4.0, and I need always to set it to framework 3.5 (Since, ax works for 3.5 - 32 bits).

The two problems (default 3.5 framework, and warning on compilation) - how can I get rid of those problems?

Thanks :)