X6 under steer !!

[welshcarter2012]

Hi again guys who can advise best for under steer !!
My x6 doesn't seem to take corners all that well , yes I'm from far the best driver however I'm sure this is contributing to my downfall .
A very good driver at my club drove it and said its under steering bad and that I need to look at the front end .. However that's as far as he got so can any 1 point me in the right direction ??

Cheers Craig