GUI problem with zoom

Hello, I have a problem with my GUI. I created two uimenu objects named Zoom in and Zoom out respectively. When i click the zoom in, i want to be able to zoom in at the axes and when i click the uimenu zoom out i want the axes to be reset. For the zoom in callback i just wrote zoom on and seems to work, but the zoom reset, doesnt seem to work to the zoom out uimenu. Any help ?

[Joseph Cheng]

Can you supply the snippits of code for each of the ones that work or don't work? it is difficult to figure out what went wrong if we don't know how you implemented it.