always you die? and from the beggining? maybe sombody turned sv_gravity too high (on some maps sv_gravity set to 999999999 can kill some players after round restart) It can be also a modifed map(wrong ents.). Or, if you have died in play-time you could just kill yourself by falling from high above. (that's why sv_gravity 9999999999 is so killerous
you can get kill even when walking down the stairs, like in real life) If your problem is diffrent you should: 1.replace that map 2.if that not help reinstal cs (or update if you have an old version) 3.play other maps