CW 6.x won't run in a WIN7 64 bit mode. There are many posts about this issue. Some have it working by replacing the driver DLL with newer compatible ones, but I could not get it working that way.
I (and others) use VMWARE (freeware) to create a virtual WinXP enviroment, and run CW 6.x in that.
Its very stable, Bit of a bother having to start the virtual machine, but it runs OK.
Note that do this you will need a WIN XP install disk.
Note also that CW 10.1 (or .3) under WIN7 64bit has some driver bug and won't connect to a DEMOJM60 board.
Last time I checked into this problem last year, P&E didn't have a WIN7 64bit machine to check out the problem.