Why can't I upgrade my player?

http://i41.tinypic.com/14ecqyx.jpg

Why is the attack area greyed out?

you can only have a max of 20 skill difference, put some skills on deff.

True what thon reply's.

Put the skill points on fysiek and when it's reach 34.4, you only have defence left. After putiing one point on def, you can add 1 point at attack and fysiek ass well.

Thanks guys!