had same problm with mine too.. some force is needed ..hold the screw with screwdriver and pusing the kereta instead.. or perhaps use playar and kepit kawkaw the screw and pusing .. good luck..
got this from xebec during his visit.. really nice ..suits well wit me personality..thnx bro... hope u dont mind i change the 'shoes' for this bebeh.. which should i go with... option 1 option 2