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Ogre Battle has been discussed thousands of times before. This question has been asked repeatedly and recently.
Please note that there is a forum search feature. Please use it before posting. If you'd read the thread called
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you'd know that. My guess is that you didn't read it. Please do so and follow the suggestions therein. You will get more effective help if you do. And our respected expert Mr Smiff will become Mr Miffed if you don't. That would be bad.
Good luck and have fun.