What kind of music... mp3, wav...???
Based on the error message that you are getting, I suspect that you are trying to insert SmartSound soundtrack(s) into your Premiere Elements 11 program. Although for some reason I have never needed the following, many recent posts by people with SmartSound issues seemed to be helped by it.
Please check it out and let us know the outcome.
My PC had an older version of SonicFire Pro... I deleted the old version and then the next time I used the "Smartsound" the program asked me if I wanted to download SonicFire Pro. I did and now it works properly. Thanks ATR & JTS.
That was great news.
Thanks for the follow up.