Ok, guess you figured SCU out so I didn't really need to post in your other thread.
As for the autocrew... I don't really use it, but assuming you're talking about the sonar autocrew, can YOU go to the station and pick up the contact? Is this a problem with the autocrew or the boat? More info is needed here to tell what is actually wrong. My experience is if there's anything more than a faint black line in narrowband the autocrew generally catches it. The auto-TMA is a different story but if the autocrew does both of those then there's really not much game left to play.
As far as there actually being a problem with the boat/mod, I doubt it. I've played both 637-types using SCU without any obvious problems, and the current version of SCX/SCU has been around for many years, and to my knowledge this hasn't been an issue before.
-UB