Hello, you have created a protocol defination so please tell that which port you assing to using MIRC. Normally it use 6667 etc..and do not define proxy server address in MIRC.If not connected MIRC then do this go on client computer and remove mspclient and then run it again from server and do not change setting in isa server after setting up MIRC. Hope this will solve your problem. Muzaffar khan MCP+I,MCSE,CCNA