I'm stuck on level 4 coz I don't know what to do after shooting the tank. HELP pls!!![b][/b]

You fired at the tank!! Damn I get shot just before I'm about to fire at it.....everytime!!!!!...would be good to save this game at will, it's a pain having to start the level every time your killed....your probably past this level now but, my guess is that after you shoot the tank make sure you have shot all enemies and stand on the circle on the radar circle...but perhaps I don't know what I'm talking about as I've not reached that yet after heck knows how many tries....lol

Best of luck