Found the problem, the old versions of VNC2Me SC contain code that requires administrator rights to run. I have updated this to look if the person is part of the administrator group, if found to be, then the app is re-run with admin rights (for better results in Vista & 7).
Im in the process of fine tuning this code (after merging most of SCPrompt and VNC2Me sources together). when i have tested that this is working thoroughly, and debuged as best i can, i will release an updated version (has been nearly 2 years after all).
The new version will contain a few tools which allow:
1) the remote user to draw on the screen of the person being supported;
2) the remote computer screen to flash green/red alternating and sound an alert.
3) Download and extract of the UVNC Mirror drivers