Problem with Timeworks reverb

[P Hallin]

Ok, I know that the more CPU consuming algorithms on the reverb are too heavy for my comp. in real-time (450 mhz). But since use-time nr 2 (forked fine first time) I cant even choose those algorithms (auditorium, large room etc.) without the program (soundforge) shutting down becuse of some error the program did in some file (cant remeber witch now but it had reverb in the title). What is this? Am I making any sense? Has anybody had this problem?