1) thanks for posting your vicidial version and build (the most important pieces of the puzzle). in future (and on your next post in this topic!) please post all your system specs. the cost of the "Free Support!".
2) you should seriously consider updating to the latest version of your branch (or to the SVN trunk!). 2.2.X is now in 2.2.1 and has many fixed items. 2.4.x is trunk and has REALLLLY cool stuff. (in addition to the bugs which were fixed in the 2.2.X branch).
directions for using SVN to upgrade to the latest trunk are available in the VICIDIAL Wiki (link at top of this screen). Takes 5 minutes
(mostly reading and download!)
3) have you tried off-time testing to duplicate the issue and see if you can find it? (although reliably duplicating a bug on an old branch ... could be a waste of time as the bug would likely have already been fixed ...
4) Matt can you move this post to "Support" and out of "General Discussion"?