Getting the helicopters to move in the JTCS Cold War mod

[Hoplite1963]

Hi
I have designed a small hypothetical scenario for the JTCS Cold War mod set in Southern West Germany in November 1973.

This features a dawn attack by a reinforced Soviet Motor Rifle Regiment on a village crossroads defended by a squadron of the US 11th  Cavalry regiment. Both sides have helicopters,  OH58’s and AH-1G’s for the Americans and Mi24-A’s for the Soviets.  For both sides these also start on map.

However when I test the scenario  neither sides helicopters are able to move and I get the message “There is no direct path to the specified hex” or “Units cannot move through existing terrain”  at the bottom of the screen when I try to move them into adjacent hexes .

Is there a way round this and or how should helicopters be deployed in order to get them to move once the game has started ?
Kind regards