Why can't i save photos from facebook to my iphone 4?

I go on the facebook app, and i click save photo. Then i go to my photos and nothing. I checked my privacy, facebook and its on.So, how do I fix it and save photos?

You could screenshot them or check that the privacy settings are on for pictures

The pictures save in the camera roll normally. If that doesn't work you can full screen a photo, wait until the "DONE" and "Thumbs UP" and "Tag" button disappear, then Press/hold the power button then tap the main button below the screen. This will capture the iPhones screen and saves it in the camera roll folder along with your other photos.