Game Problem: Soviet Strike 'Strike Agent killed'

Crazy C

New member
I Just began playing this Game.

In the First Level Crimea after some time it's Always 'Strike Agent killed' (SNAFU) and the Mission ist terminated and I Shall return to Base...
What does this mean?
I destroy the Radar Sites and other targets and suddenly the Game Always tells that a Strike Agent has Been killed and I failed to complete the First level, what am I doing wrong?