KX-TA 824 support (by 2 users)

I just installed KX-Ta824 system. I am unable to program the following features:1) I just want to leave outgoing message for customer. I even bought the expansion card that increses the time for OGM to 6 minutes. I can leave a OGM but customer are unable to hear it. I am using AT & T voice mail right now.2) I cannot use a non propierty phone with my system.3) I cannot program the music on hold feature. Any help would be greatlyh appreciated. I have tried Panasonic to even get me paid support but without luck.