It sounds like you need to initialize your DICE module again. This is ussually the main issue with these units as they are very sensitive to how they are hooked up.
1. Disconnect negative battery terminal.
2. Disconnect DICE (either the module itself, or the CD changer connections).
3. Wait 30 minutes.
4. Reconnect DICE.
5. Reconnect battery terminal.
OR:
1. Disconnect both battery terminals.
2. Touch both leads together. (*WARNING* REMOVE THE LEADS FROM THE BATTERY ITSELF FIRST BEFORE EXECUTING THIS STEP!)
3. Disconnect DICE (either the module itself, or the CD changer connections). 4. Wait 5 minutes.
5. Reconnect DICE.
6. Reconnect battery terminal