server and client at the same router/lan problem

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Hi! Need som help here! Running Apexdc 143 and YNHUB hub server under the same router/lan. I have problem to get proper active status in apex. There was no problem when the ynhub server was running otherwise, but now I cant up and download properly . The port forwarding in my Linksys router seems to be alright. when I connect to the hub the server immidiatelly answers that the client sends the wrong IP to server, but this is the WAN IP that Apexdc receives, but the server says that the IP is the router gateway IP 192.168.1.1, which is wrong! Please help mu how to set up router and Client and mayby the server...OS is XP pro on both pc's. No software firewall is running in system...