Problem with Photoshop CS3/blocked

Every time I open my Photoshop CS3 program a blank white box appears with heading 'Adobe Web Suite Premium CS3'.  There are 3 circles at left, one in is in middle (orange) with - sign and I can remove to dock - however, I still cannot open my files and work now.  Then I have to force quit Photoshop just to get rid of white box.  Please help!