AppHangB1 Error in Vista

I've recently installed Flexsim on a Vista Platform and found the posts about UAC woes very helpful. I am now having another issue. Whenever I try to do anything in Flexsim, this could be clicking on a source or trying to open the treenode dropdown, the whole program freezes and I get an error message from Vista: AppHangB1. I will post the entire error message below. Can someone help?

Tison Bolen

Description:
A problem caused this program to stop interacting with Windows.
Problem signature:
Problem Event Name: AppHangB1
Application Name: flexsimrunner.exe
Application Version: 1.0.0.1
Application Timestamp: 47d5ab5e
Hang Signature: d558
Hang Type: 0
OS Version: 6.0.6001.2.1.0.256.1
Locale ID: 1033
Additional Hang Signature 1: fa280399c997df531889d5eadb512c1f
Additional Hang Signature 2: 7aa3
Additional Hang Signature 3: e11a36d0404fbfa1ddc22e306e05cf70
Additional Hang Signature 4: d558
Additional Hang Signature 5: fa280399c997df531889d5eadb512c1f
Additional Hang Signature 6: 7aa3
Additional Hang Signature 7: e11a36d0404fbfa1ddc22e306e05cf70