I programmed Part Mail VS R5 on an ACS 3.0. All worked fine. Brought to customers site & put into an ACS 4.0, everything works EXCEPT you are unable to record MB greetings (I assume also AA though I didn't check as they were OK)or leave messages. After stating "leave message after the tone" you get no tone & immediatly says, "your messageis to short", and asks you to select another extension. Brought back to my office, plugged into R3.0 and it works fine!