P990i problem with the x-plore uiq3

Question

hi! im louis and i have this sony ericsson p990i. ive installed an application called the walkman 2 for my phone..in order to make this application work, i have to install this x-plore uiq3 and the capswitch in order to hack the private profile of the c:/ and change the interface of the phone..it actually works. and i tried to refresh my phone and when i turned it on nothing appears on the screen. just blank white screen.. what must i do? please im really in need