The exact issue is this:
if i use TMS right in TWS mode, my radar convert all contacts to track targets, also friendly target.
So, i try to use TMS up to track single target in group of contacts and i can only lock 1 or 2 targets in a group of fours for example. It's a strange behaviour, if use TMS right, all works fine but TWS locks also friendly, if i use TMS UP a cannot lock whatever i want but some hostile remain not locked.....