Well after 60 seconds I get this:
The CLR has been unable to transition from COM context 0x20a310 to COM context 0x20a480 for 60 seconds. The thread that owns the destination context/apartment is most likely either doing a non pumping wait or processing a very long running operation without pumping Windows messages. This situation generally has a negative performance impact and may even lead to the application becoming non responsive or memory usage accumulating continually over time. To avoid this problem, all single threaded apartment (STA) threads should use pumping wait primitives (such as CoWaitForMultipleHandles) and routinely pump messages during long running operations.

I really dont need to expand the groups. I did not know it would enumerate all the members of each group for the entire groups OU. I was hopping it would just show the members when I click on that group within the OU. Anyway, great work and this will really save me a bunch of time:-)