If your map doesn't match the servers: READ THIS

[Amy]

You'll have to get into your cs:s folders--

c drive program files
valve
steam
steamapps
steamname (still a folder)
counter strike source
cstrike

Look in MAPS and in that folder the one called graphs

Delete EVERYTHING with the particular mape name (cs_office, de_nuke, etc etc) in it.

that should work -- you'll be able to redownload the maps from our server when you connect and the server is on that map, or changes to that map.

[jackle]

what if you get that message but the map isnt in that folder at all.

[The Black Dart]

search more carefully or just plain reinstall/delete all ur maps and DL them again.