projector setting

SOrry if this is in the wrong area but didn't find one that was specific to projectors. Heres the deal. Hooked up my MBP to an epson projector using the mini display port to vga adaptor I have. FIrst time I hooked it up using powerpoint it worked perfectly. Next time I hook it up the following day the power point presentation is not filling out the whole screen. Its like squished horizontally. It fills the vertical space just not horizontally. Its like it has black bars on the side. Same Powerpoint and everything so I don't know what the heck is going on. I messed with the display settings etc but had to go one with my presentation. Ive googled but can't find anyone with the same problem.
Any help appreciated.

 

well figured it out. The epson projector when I went into mirror mode was acting funky with the powerpoint and shrunk it horizontally. Turned mirroring off and started presentation and it worked fine. go figure...