3D workspace grid/lines not showing?

Hello! I upgraded to Unity 3.3 and I am having a problem with the environment grid, its not showing up at all… I never had this problem with an older version, but when I upgraded the grid was there at first and then disappeared. FYI its not the textured grid that I am talking about its the grid that maps out your 3D workspace. Any information will be appreciated, Thanks!

Check your setting of this button:


The screenshot shows the Game Overlay button