Debugging with VS 2010 in IIS 7 classic pipeline

I am trying to debug an ASP.NET website in VS 2010. The website is running in classic pipeline mode in IIS 7 on a Windows 7 64 bit machine. For some reason my breakpoints are never hit. I use the attach to process method to attach to the w3wp.exe process. I do not have enable 32 bit application enabled on the app pool. If i use the integrated mode it does work. i would rather开发者_StackOverflow use the classic mode since my production server runs IIS 6.

Fixed by selecting the "Attach to" as "managed 2.0" in the "Attach to process" dialog. Never had this issue with vs 2008.