Wirelessly posted (Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0) BlackBerry8100/4.2.0 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/100)

When I press the menu on google maps snd on java games (but dope wars works fine) the menu pops up on the top left part of the screen for just like a split second and goes away, anyone know why?