Help Help Me Plz X10 mini not booting

[s0me0ne]

hi i am new to this forum
i really need some help i tried to change my x10 mini theme and now the phone wont boot when i press the power button it shows the sony ericsson letters then it reboot again and again .....
plz help what should i do

 

[Sam-SonyXperia]

You are going to need to run a software upgrade to get this to boot again, I would also advise not re-installing whatever it was that you installed prior to this happening.