camera not moving up or down

i used http://www.garagegames.com/community/forums/viewthread/67176/ resource. The camera is not moving in vertical axis when I moved the mouse up or down. but the character's weapon aim direction is changing depends on the mouse movement. there are some changes in from old Gameprocess.cc to new TGEA1.8.1 GameProcess.cc file. can anyone of you tell me how to solve it?? plzzzzz help me.... thanks in advance..