[Roy Dennis]

When you open Tools/Songs database/Build Database , in the bottom left window below the Add Folder button, do you see any folders listed ?
If not can you use the Add Folder or Add Folder/sub folders button to brows to the folders on your external hard drive if that is where your song files are ?

If you see the folders listed what happens if you select one, do you see a list of the song files appear in the right hand window ?
Does the drive letter in the file path match your external hard drive path make sure the drive letter hasn't changed.

If you do see the files listed and the drive letters are correct try pressing the Rebuild database button.

If that doesn't help close Hoster first then open your C/MTU/Hoster folder, find the songs.mdb database file and delete it. Now make sure your external hard drive is connected first before restarting Hoster, don't panic because Hoster doesn't open right away it should build a new database.
You should see a small dialog state building database and it should take some time if it flashes by quickly and no different let us know

If you still need help let us know the type of files you had imported Kma or KMH and that you can see either types listed using windows explorer.