fix fujifil s1800 help! please!?

I am having some trouble with my fujifilm finepix s1800 digicam
when I click a picture it shows me the picture and at the bottom left corner of the screen it says ok and next. but I cannot figure out how to select anyhting but ok. and if i click ok. it just takes me to the picture clicking mode. this did not use to happen earlier. now I'm confused what is wrong with it. And if I try to view that photo that i "ok"ayed. My camera gets hanged and if I restart it then ask to see the photos it shows "Error" in place of the photo and if I try to put those photos in the computer, it shows they are of 0 kb.
Please help... Did I do something wrong with the settings? I really need to use my camera immediately. How do I get back to how it was functioning before???
Help!
Thank you