files deleted from harddrive still in library

Hello,

I have several folders with my music in. I've imported them all in the songbird library.
I have removed some folders and some songs from my harddrive, but the songs remain in the library.
Even if I use the Import media it still keeps the files that are removed from my hard drive.
Is there anything that I can let songbeard search for this files and remove them from the library?