If you figure out how to solve your problem, please let me know.
I installed the IM hack yesterday, and i am also not getting the pop-up notification of new messages. Receiving and Sending works fine, but no pop up...so it isn't just you.
Donate to UBBDev today to help aid in Operational, Server and Script Maintenance, and Development costs.
Please also see our parent organization VNC Web Services if you're in the need of a new UBB.threads Install or Upgrade, Site/Server Migrations, or Security and Coding Services.