Thanks for your reply.
When I run the gameserver "by hand" (create a shortcut to the executable and give the parameters), it starts up the gameserver software, and the gameserver comes online. When I look in the task manager, I see the memory usage rise to 120MB, which is a good sign.
When I run the gameserver in AaS (default settings, only defined the executable, parameters (see startpost) and display name) the gameserver doesn't come up. When I look in the task manager, the memory usage is only 7MB, so it's hanging somewhere.
All our servers are running on Dell hardware (most of them are PowerEdge 1750's, 2x Xeon 3.06GHz, 2GB memory, 2x 36GB SCSI, Windows Server 2003 Std. (SP3)).
Please let me know if you need more details.