omenserve isn't really a good script in imo, but for some it does the job i guess. i would suggest looking into a different script. but as to your problem try the blank mirc idea like coolkill suggested and also recheck to make sure that all firewalls are off and if a router is involved make sure it's setup correctly with mirc....
IE: depending on the type on connection you have(specificly dsl) some dsl modems are combo modem/routers.... in which case you would have to have access to the admin commands, if you can change them at all.
i hope this bit of info was at least informative(somewhat).
