Blocking cdb from loading symbols for a specific DLL

I am using the 4.6.3 libraries on a Windows XP machine. My compiler is MS Visual Studio Express 2008 and I am running the cdb debugger.

I have a prebuilt DLL that was built without debugging symbols that I wish to integrate with my application. However, if I build my application with debugging symbols I get a "Bad Allocation" exception at my first call into this library. Buildling my application in Release mode is working.

Does anyone know of a way to explicitly block the cdb debugger from attempting to debug into this DLL? I see no way to pass flags directly from QtCreator, but I could make a .bat file wrapper if I really need to. None of the cdb command line flags are jumping out at me.