Well, continueing from the past two postings, I have figured out what the problem was with the sending of SNMP traps. Apparently trap2sink sends a SNMPv2 trap, while trapsink sends a SNMPv1 trap.
trapsink works, trap2sink does not work.
I do not know why, but I have tested this. With trapsink configured alerts are received in IT Assistant, with trap2sink configured, no alerts are seen in the alert log.
That solves that! I think I finally have a fully managed 64-bit Debian Server....whats next?