Hi,
I'm trying to set up DAoC on a second PC (graphic card 9800 pro, latest ATI 6.12 drivers) and I have a strange problem.
After a few seconds in game, all mobs and npcs disapears.
If I go to the place where the mob where, I'm attacked by 'invisible' mobs.
If I change of zone (for instance enter in a dungeon), npcs/mobs comes back but they disapear again after a few seconds.
Everything else seems to work fine: I can continue to chat with my guild friends.
I think it might be related with my config or drivers.
Anyone ever heard of similar problem ?

This sounds like server update packages are not received regularly by your client. The most obvious cause would be a firewall (or router) which is blocking the traffic. If you have one active, try disabling it - or at least changing the configuration to open up port 10300 and 10400 (hope I got them right?). Another option are background processes which might reduce your bandwidth (such as file sharing, messenger, ...).

Good analysis T-man ! I've stopped my Kerio firewall and I've been able to play a few minutes without problem !
Well done and Thanks !