Ask the Experts / uces error trapper

hmmm, dont know if this has already been posted (sorry if it was) but everytime I click on a scenario out of the custom add on expansion pack for rct2, i get error trapper EVERY time. I have installed and reinstalled thousands of times, but i get the same error trapper message ACCESS VIOLATION. I am on vista and rct2 runs fine, and i always run rct2 on administrator. I really want to fix this problem but dont know how, so if any one oculd help me, please do.

i get the same exact thing.

I thought that the first time you run the scenario then it will trapper then when you reload the game and click on it again, then it works.

just out of curiousity
try to open the scenario trough the scenario editor