I have seen this behaviour before.
We installed VuGen on a "MS Terminal Server"-server, with the goal to do our scripting on this machine with 3 co-workers.
Only one of us was able to use the Function reference, the other two could not us the function reference.
They saw a empty page in VuGen.
I now have a Windows 7 virtual machine for me alone. (performance is bad, i'd rather have physical hardware with SSD)
No problem with opening the function reference anymore.
What is your situation?
Dennis