[Al B. Drinkinbeer]

The players must have the custom maps downloaded and installed correctly in order to play a server running said custom map...and that sv_allowdownload 1 feature does not work, in Spearhead or Allied Assault. Getting a group of players with the custom maps in your rotation has always been a challenge to server admins...good luck!

The map should work fine in SH, most of them do.

Hope that helps