Xperia X10 :: Why Won't Connect Via Blutooth

I just got the xpweria mini x10 and its possibly the most appaliing phone ive ever had from sony. Its not easy to use, nothing is easy and the nclear simple interface that i liked so much from sony has all gone. Worst of all it won't bluetooth. it will find other phones and pair but won't then connect. it also locks itself in about ten seconds which makes it a loain to use all the time And generally its too small and messy to use the touch screen comfotabaly.