Hey Mike,
What version of Hoster are you using? I ask this becaue I see you joined the forum in 2006. The answer to this qestion will let us know what advice to give you.
Hoster 4.08 imports zip files but they are converted to "HDBIN" files before they are added to the database. The zip file format is very inconsistent. Some of your zip files may be bad. If you have some bad zip files you can purchase a copy of Songverter for $40 (well worth the money) and either convert them into bin files (which Hoster 4.08 is going to do anyway so I advise you do this

) or re-convert them to zip files and they will import into Hoster 4.08 (and be converted of course).
If you have an earlier version of Hoster that impotrs zip files without converting the to "HDBIN" files, you can see if the files that did not import will play in Hoster by using the buttons at the top of the main page (The manual will tell you which one to use). Odds are they won't which means they need to be repaired (using Songverter) in order for them to import into Hoster.
Hang in there, we'll get you going!
Jim
