Hi thanks for your replies, my SH4 is installed onto C drive and not into the Programme Files. I think the 4gig is loaded and my activated mods as follows.
TWOwTw 2.50
wTw 2.50 Max optics with Crosshair
Bstakos6 SH$ Radio Channels
wTw 2.50 Historic Torpedoes
TWO Smoke mod
Ice Station Zebra Main Title Theme