sorry nohidingplace i thought you had a new firmware release, but that file is just a key file and we arent allowed key files posted here unfortunately.
It doesnt solve the problem anyway you need to have firmware dated 27/8/05 loaded on your tm so that the keys dont auto-update, then you can update the keys.
Is there anyone with TM1500 that hasnt solved their Cabo? I will post a correct firmware if needed.