MRI Ruby Fast Debugger with NetBeans 6.1

I am running into problems with NetBeans 6.1 installation on my Windows XP machine again!  This time it is fast debugger.  I was running NetBeans build 4/11 without any problems which correctly recognized the fast debugger.  I just updated to the announced build of 6.1 and it does not recognize the fast debugger in the MRI anymore?  No changes in any gems simply an update and it fails.  NetBeans asks me to Install the fast debugger, I do it anyway and nothing happens?  Anyone else tried installing fast debugger on Windows machine with the shipping release?