Got AIM 5.9, can't hear the IM alerts

I upgraded to the newest version of AIM and for some reason, now I don’t hear the ding when someone sends me a message. I’ve gone into Preferences several times to check that they’re turned on and as far as I can tell, they are. I even noticed a feature was checked that says “Allow for volume reduction of IM sounds” so I unchecked it and clicked Apply. I’m still not hearing my IM sounds! And yes, I know the speakers are working because I’m having no trouble hearing music through Winamp.

It could be something totally obvious that I’m missing, but I’m stumped. Help, please?

On the edit your sounds page make sure “only play a sound when first message is recieved” is not checked.

I think it is by default.

AHA! Thanks!!