reverb crash in xtc

[the19thbear]

hi, i´m finally using xtc mode, and it works great, except for some small bugs.
a couple of plugins seem to crash my computer and cause it to reboot, everytime i try to use them..

they are:
PT 2012 (crash)
reverb beat (crash)
mixmaster ( crash)

i use cubase sx and when it opens up to initialize the new sfp plugins, and it opens up one of the above plugins, the computer reboots.. any clues?
everything else works perfectly and i have no problems with any other plugins.

thanks