.net Project Compliation error

I’m having difficulties getting the runtime to work correctly.

I’m setting up our new build server. The web project uses CR2010. I’ve installed the SP3 version of the 32bit runtime. Using MSBUILD to build the web project I am getting the following error:

ASPNETCOMPILER : error ASPRUNTIME: Type 'CrystalDecisions.Shared.CrystalReportsException' in assembly 'CrystalDecisions.Shared, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304' is not marked as serializable.

This environment works fine on our old build server (win2003) but not on the new server (win2008).

Any ideas as to what I’m doing wrong?