How do you bribe the Soviets?

How do you bribe the Soviets in that one Allied mission?I selected both my spies and clicked the "$" button and then right-clicked on a Soviet guard.I kept alternating between them but nothing happened!!!

They didn't move,and I ended up getting all my men killed.


Is there a trick to doing this?Am I doing something wrong?


I should have known those alien maggots booby trapped this sub.