Good Day all

I have a question for you.

I have recently bought a new pair of inline skates, in fact Salomon
FSK Deflectors. Although these skate are much more comfortable than
my previous, I cannot seem to get my balance.

I feel that I am not centered and am leaning on one side; this is
also giving me serve lower back pain.

Normal I can skate mile after mile, but right now I can barley manage
1 ½ without serve pain.

Is this just breaking in skates or is there something else I can do.

Any help would be appreciated

JohnnyO