rtcw problems

well i went to play rtcw 1 player for a piss about and it wouldn't load, this is the problem it was saying any ideas ladies (its from the cd and not downloaded)

Error: file ui/system.menu, line 1: file ui\menudef.h not found
Parsing menu file:ui/options.menu
Error: file ui/options.menu, line 1: file ui\menudef.h not found
Parsing menu file:ui/credit.menu
Parsing menu file:ui/connect.menu
Parsing menu file:ui/quit.menu
Parsing menu file:ui/vid_restart.menu
Parsing menu file:ui/snd_restart.menu
Parsing menu file:ui/rec_restart.menu
Parsing menu file:ui/default.menu
Parsing menu file:ui/error.menu
Parsing menu file:ui/serverinfo.menu
Parsing menu file:ui/quitcredit.menu
Parsing menu file:ui/resetscore.menu
Parsing menu file:ui/buy_pop.menu
Parsing menu file:ui/multiplayer_pop.menu
Parsing menu file:ui/play.menu
Parsing menu file:ui/load.menu
Parsing menu file:ui/mods.menu
Error: file ui/mods.menu, line 1: file ui\menudef.h not found
Parsing menu file:ui/briefing.menu
UI menu load time = 10 milli seconds
recursive error after: menu file not found: ui/ingame.txt, using default



help thx