L 03/23/2010 - 22:06:17: Info (map "cp_dustbowl") (file "errors_20100323.log")
L 03/23/2010 - 22:06:17: [SM] Unable to load extension "teleport.ext": Extension version is too new to load (5, max is 4)
What version of sourcemod are you running and your OS? SM 1.3 and 1.4 should work.