Just programmed a KXTVA50 Voice mail system with custom greeting and delivery prompts. When you call and get the greeting, it repeats it self about 1 second behind the first recording. Also if you leave a voice mail in a receipients box, it comes up as two messages. In other words it dupilcates the first message left by the caller. The system is digititally intergrated with KXTDE100 PBX. Help please! Trying to get this up and running for a local volunteer fire dept.