music will not delete

I am having a problem with my droid x. I got it in October and have downloaded about 1300 songs on it. But some of the songs duplicated. When I try to delete one of them on the sd card the screen goes black I then have to reboot and the song is still there. I then push the song and it reads error. I am not rooted and read the forum everyday. Please can someone help me!

 

What app/service did you use to download the music?

How are you going about deleting them? from within the music player? with an sd card explorer (ie Astro or Estrongs?)

What folder/directory is your music stored in?

 

I am deleting them from the power amp app. As far as the folder I am not sure its just from playlists and song list. I am still new to the droid and do not understand the folders