Where is the enemy?

[XenonSurf]

I have SH4 with U-Boot Missions 1.5. I have started to play the German campaign once in stock, once with FOTRSU 1.1 mod, but in either cases I don't get any reports from enemy convoys or task forces (red squares), only a lot of reports from friendly units. So where is the enemy in the pacific region?
Also once I was ordered to deliver supplies at Tokyo, once arrived after a totally quiet voyage without encountering any enemies, the game finally crashed when I deliver the goods by pressing 'Launch Boat' at the objective.

Of course I could play SH3 or SH5 when playing the German campaign, but I wonder what I'm supposed to do and where to patrol in SH4 U-Boot campaign.



Thanks for any feedbacks,
XS