Issue with Pro53 and Logic 7.1: Can You Help?

I'm having an issue with NI's Pro53. I love this plugin; I've used it a lot. My issue is, when i open a previous project that has a Pro53, or call it up for a new one, i get one loud digital clip sound, and then Logic 7's audio goes dead. It's like it gets overhwhelmed and can't play anything till i relaunch. When I quit, it makes the loud, quick static sound again and then it's okay. Until i try to use Pro53 again.

I have lots of projects that already incorporate Pro53.

I tried using AppDelete to throw away anything associated with Pro53, trashed its folder and reinstalled it, then restarted. Still the same problem.

Any ideas?

Thank you in advance for any help.

 

Sorry, I forgot to mention: I use Mac. OS 10.4.7. Thanks.

 

mmm, this one sounds weird.

First are you using the most recent version?

Cheers

Andy