Hi Server 2003 Gives you max 2 concurrent RD sessions WITHOUT a licensing server. So if you want more than 2 on a 2003 Server, you need to install/configure this service. For XP, no concurrent users are allowed. Before SP2 came out, M$ said it will support 1 concurrent user (1 local, 1 on RD), but it was removed from the RTM SP2 for reasons not known to me. (Maybe of license agreement of XP?) Anyhow, this 'hack' you use is from SP2 Build xxx (not RTM), not supported, and i don't know if it's stable and if it works correctly. Does it? You can not (to my knowledge) install licensing service on a XP machine, and you can not have any concurrent sessions on it eather. Only with 3th party software. Greets Davor