Have you registered your copy of mIRC?
If not, note that mIRC is a shareware program, not freeware.
When you initially downloaded mIRC, you were given a 30 day trial period. After that trial period you are, legally, required to register mIRC ($20 US) or stop using it.
Since you state that you've been using it for 3 years (possibly longer), you are definetly(sp?) over the 30 day trial period.
If you have registered mIRC, then the registration information was sent to your e-mail, and you should've kept it. If you didn't, you can get it replaced by going to
Reglost