Excellent!!!
I finally got it doing the following steps. I was deleting EXT 128 in my example.
1. Clear Feature Buttons.
DEL MLPFB,,128,ALL
2. Cancel Message Waiting.
CAN MW,,128,ALL
3. Display DIRECT STATION SELECT BUTTON
DIS MLDSB,,141
In Step 3, my DSSDN and BNO was 140 and 110...