Unable to start addon...

Hi, fellas!!!
First of all, let me just say A JOB WELL DONE DEVS FROM ROMANIA for doing this franchise and I hope you keep up the good work... As AliG would say it, RESPECT!
My concern is the addon, as I installed it successfully, start the game [or simulator :-) ] and it goes into main menu, start the german campaign, setup my boat and all, click ona big map in that room to start a mission, it loads till the end and BAM: Silent Hunter 4 has experienced an error and needs to close bla bla... SH4 works normally, only mod I have is sub killer and SSN LA 688i imported from cold war mod. Resolution is 1650*1050x32, CPU is QUAD Core Q6660 @2.40, GPU XpertVision 8800GT Super+ 1GB, 2GB RAM and around 1.25TB of HDD. As I said, SH4 works normally maxed out, but when loading finishes when I start u-boat campaign, it crashes. Any solutions?

P.S. Also wanted to say to devs: great graphics, outstanding gameplay, brilliant product!
Take a well deserved rest and start working on nukes!!!