BB Mac Desktop Manager (v.2.2.0- build 17) unable to auto back-up

[runnerpete]

I just downloaded the new Mac BB Desktop Manger (v.2.2.0- build 17); I can sync my calendar, notes and tasks but now am unable to complete an auto back-up. I get this message, "Blackberry Desktop Software failed to backup your Blackberry device. Reconnect your device and try again." I have uninstalled and reinstalled onto my Mac (v.10.7.2) to no avail. My prior version of BB-DM worked just fine with syncing and auto back-up. Does anyone have a suggestion to resolve? My carrier (Telus) informs me that the BB-DM for Mac is in general "unstable." Can I just revert to the previous version need be (and where can I find the previous version?)

Thanks,
Peter