Normandy '44 Gold

[Bloody Bill]

Hey,  so I am new to the Panzer Campaigns series.  I am playing The invasion of normandy campaign scenario.  I am really enjoying the game except for one extremely annoying thing.

Here is my situation.....I have around 400 US para's assaulting and isolated, disrupted gun position.  The gun is less than 10 I have killed three that it let me know of.  I am assaulting from 7 sides and my para's for four turns cannot cause losses doing assaults.  Every assault is 1/no effect.  I lose one man nothing happens to the gun.  This very same situation is happening on four other gun positions with other para's not being able to take out isolated guns with overwhelming troop numbers.   I know the guns are supported but this seem's strange to me.

Maybe I am missing something.  Any help would be great.