ERSP: RIM Sync Error: Invalid Class String

[AB42667] The error message "RIM Sync Error: Invalid class string" is typically caused by Windows security measures preventing CompanionLink from properly registering itself as an add-in to BlackBerry Desktop Manager. Follow these steps to fix the problem:

1. Exit CompanionLink and BlackBerry Desktop Manager.
2. Right click on CompanionLink Setup and choose "Run as Administrator".
3. In CompanionLink, click the BlackBerry Settings button, then click OK.
4. Right click your BlackBerry Desktop Manager icon and choose "Run as Administrator".
5. Restart the synchronization.