Why can't I install the xpress mail??

I was installing the xpress mail on my cell (it's a samsung Blackjack), but in the middle of the downloading I accidentaly press stop, and now every time I try to re-install it, I get: "The file insufficient.xhtml was not found. Back to InfoSpace." I clicked the 'back to infospace' link, but nothing happens. The same thing appears when I try to use Internet Explorer.