iTunes for Windows: music with a ! near it

ok so i have two external usb drives (not flash drives)...one is called E and one is called F.

i had all my music on the E drive and moved it to the F drive. In itunes i went to edit - prefs - advanced and changed the itunes media folder to the F drive. and now all my music has a ! near it and if i click on a song it says t cant find the song... how do i fix?

 

Try dragging and dropping your relocated music into the iTunes Library pane.

The right way to move your music for future reference:
http://www.ilounge.com/index.php/articles/comments/moving-your-itunes-library-to-a-new-hard-drive/

 

As plodr suggests, maybe change the drive letter.

I have changed my external drives to a permanent drive letter to overcome the problem of plugging/unplugging various external drives.
Using X, Y and/or Z as a guide, gets you well away from any other complications.

Microsoft have a link to How to change drive letter assignments in Windows XP, for example, at http://support.microsoft.com/kb/307844

Or do a Google Search on change drive letters for lots more links.

Hope this helps.

Bazza