scanning for a ip

[ZmanGold3000]

question. i was able to do this before but havent been able to do when i updated my mirc and invison. i want to a scan for a group of ip's. i know u go under irc scanners and do a quick scan for a ip but when i put it in it doesnt register anything. it doesnt even tell me not there. i know i should get results since i have even tried doing like .aol. so anyone have a idea of what is wrong