Hi, had the Alko 1300 unit on caravan when purchased new, but I was not satisfied with it so upgraded to a new Alko 2004 which is now one year old. Arrived this weekend on (my first) five star caravan site and the Alko 2004 would just not release from car towbar. Tried all I could to release it (car forward/backwards, "handle" from side to side. Just nothing would release "it". Had a "cuppa" and then Alko 2004 just separated as if it was the first time it had been used. Any suggestions would be appreciated. Thanks.