8.5.10 Crash's opening plugins most times...

Hey guys been a while since i used wave lab and it was rock solid 4 months back , i’m getting crash’s almost every time i open a plugin with the avid core audio manager as the sound output , my only other option is built in line in and thats crap!

anybody got any settings tweaks to keep it up and running ? 512 buffer

pro tools 10 , latest version HD TDM HD192 interface core % accell