When I installed this on my Sylvania Express Tablet, I got a notification that v5.0.3 was available, but the marketplace still has v5.0.1. Is this a mistake?

im+ on pandigital multimedia 7" android 2.2

I keep getting cannot install on this "phone" --does anyone have a solution. This is a 7"tablet w Samsung chip and ARM11 processor, I would like a chat app.