X axis will not home

 My y and z will go hit the endstop reverse and park 1 mm or so away from endstop. When I click the home button for X under manual controls it just makes the current position home. So if I have the X-carriage in the middle then hit home it will not move left but will try to go up to 200 mm right grinding into the support (and the end stop) I have checked M119 changed max end stop default changed side I put my end stop on. Change x-home from min to max in repetier with no luck. 

 What I don not understand is why the y and z will home to the endstop switches but X just sets home in Repetier any one know why? 
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