A supplementary question ("debugging a vc++ 6.0 dll called from a vb.net routine")

At the moment, using the program written in vb6 which calls my dll written in vc++ 6.0, I can trace through the dll line by line by using Ctr F10 etc - perfect, no problem

Before I move to vc++.net (yes, that seems to be the route) I had hoped that I could trace through the vc++ 6.0 dll when called from the debug version written in vb.net but it says ".exe does not contain debugging information" despite the fact that there is a pdb file generated by the vb.net compiler in the same folder as the exe file.

So, is this possible? If so, what do I need to do?

Thanks in anticipation