My sony ericsson w890

Question

hi ive brought a w890 brand new and the day i got it te camera was working fine then i carged over night because the battery was dead then when i tryed taking a picture off my mobile it just swtched off and ive now tried about 6 times and it keep happening, but i got a program called face warp and it takes pictures and makes them look funny so i tried that and i was able to take a icture but i cant when i go to the menu and try to click camera it wont ork so wha shall i do and whats the problem?