Trouble with your CM11A?                                            

ONLY if you have a CM11A :

If you can't get the CM11A to communicate with XTension.
  on first attempt, 
  or if it WAS working and now it doesn't :  

Perform the following sequence exactly :

1.  Unplug the CM11A from the wall socket
2.  Unplug the serial cable from the Mac.
3.  Make sure batteries are NOT installed
4.  Leave the CM11A unplugged for ONE HOUR
      then:
5.  Plug CM11A back in to wall socket
6.  Plug serial cable back into Mac

To verify operation, tell XTension to send a command
to any X-10 address.  
Error messages will appear in the log if there is still a problem.

XTension does not have to be shutdown for this.

This may seem like Voodoo, but like other forms of magic, 
the steps must be followed carefully.  And, like Voodoo,
this will revive all but the most 'fried' unit, just as 'magically' 
as it quit working...