I hope someone can help! Situation: Hotel has an SX200 ML system with carded Express Messenger. The Express Messenger has stopped working an been replaced 6 times, yes I said (6). Guest can not make wake-up calls again! This system was put in 2004. It has all the protection one can have! The interface keeps going down. Micros/Fidelio said that their PMS is working fine. The Express Messenger this last time was moved to a different slot to elimate the slot it was in. We have used so many TC credits with Mitel an all they have done is replacement. PLEASE!!! Any Suggestions.