- welcome to the forum!
Not an easy answer w/ the limited information provided. First, I'm assuming that you are using the 'native' photo app on the iPad; if so, what version iOS are you running on the iPad? The 'photo app' for the iPad was updated w/ release of the newest iOS, v. 5x - just a starter.
Second, if using the most recent version of the 'native' photo app, is this photo located in the 'camera roll' or elsewhere - may also help to know how the photo was put onto the iPad, i.e. from the camera, from a sync, or other method?
Please respond and more specific advice can be given - good luck!