A friend of mine asked how she could set up sounds to let her know when certain people come online or leave. She told me that she'd already tried setting the sounds in the Options and in the notify list.
With her permission, I accessed her computer remotely and confirmed that the settings were all set correctly and that the files she wanted to use did exist in the correct location.
I was unable to confirm audioably(?) that the files were valid, but based upon the format and size returned for the files, they do appear to be valid. She states, and I have no reason to not believe her, that the files are valid, and that she can hear them through other programs (ie: WinAmp), but she can't hear them through mIRC.
As I am at a loss to explain why everything looks correct, why she is unable to hear the sounds when people join/part the network, I thought I'd inquire here as to other options. She prefers to not use a scripted option, but if that is her only choice, the fact that she uses PnP may be relevant.