I've just foung the *dll file that fixed the problem!It was an OpenGL problem with the ATI Rageon driver(I think).The *dll file fixed the problem and now I can continue the Citizen Arms mod.I'm so glad that I'm back in the HL mapping,because I'm very addicted to it.The name of the *dll file is atioglxx.dll
Back on the Half Life mapping road!
This is excellent news! Keep it up!