Thanks, but still incorrect.

10/02/2006 02:12 13/02/2006 06:33 #VALUE! should be 1:03
09/02/2006 08:00 09/02/2006 08:33 14:33 should be 0:03
13/02/2006 06:30 13/02/2006 07:33 0:33 should be 1:03
12/02/2006 02:12 13/02/2006 07:00 1:02 should be 1:30