User debugger on 64 bit machine with 64 bit ODP.NET

I am sure a lot of people had problem with debugging web application on 64 bit machine that also uses 64 bit ODP.NET. I could not find any solution, so hope someone point me to right direction.

I am using Web Developer Express 2012 which is 32 bit application, my dev machine is 64 bit Windows 7 and I use 64 bit ODP.NET for Oracle connectivity. 

I get System.BadImageFormatException because the ODP.NET cannot be loaded.

-Thanks