You can use COM to interact with iTunes, thus avoiding this entire issue, as you can use commands in mIRC to get this data from itunes.

I gave some code to retrieve info from iTunes and issue some commands to it in a thread on mircscripts.org here

Furthermore, a while ago, a friend of mine released a snippet which provides iTunes controls, which you can find here

To use either code, you need mIRC 6.16. Load it in your remotes, and you're good to go. Easy as pie.