Hi, the "onMapSingleClick" command isn't a one shot deal you can use it again and again.
The way I normally use it is a radio trigger to select the type of action I want the radio command to associated with first, say artillery. Then just open the map and click, that's it.
Obviously you need the sript behind it to do all the hard work, but I guess if you don't have that it's never gonna work.
eg.
Trigger Alpha, Name: (Artillery)
OnAct: onMapSingleClick {[_apos] exec "artillery.sqs"}
or
Trigger Bravo, Name: (Call Helo)
OnAct: onMapSingleClick {[_hpos] exec "movehelo.sqs"}
"Foolish are the people who play twister on the stairs" - Master Yoda