I am working on a 1999 Bluebird Wonderlodge Private Coach with an Allison Electric shift transmission. Drove it 300 miles and parked it in the shop. Now it won't move. Doesn't go into forward or reverse. Any suggestions as to why? Also, on the main control panel above the drivers head it says "Please enter drivers code now". Does that code(5 digit), whatever that is, need to be entered before it will shift? Any help will be greatly appreciated!