Changed timing belt wont start!

Yes. Although only one of the two sensors usually triggers the fuel pump shutoff (a la lessons learned from the Ford Pinto), get both checked out (which means wiggle the wires and see what that does, look for bad wires/connections/wire harnass issues, and consider paying for their replacement.) No fuel, no starty.

Was the timing marks set correctly with no.1 at TDC?