not possible to play with gem "rolling slam"

hi :)

yesterday i did some changes in my skill tree. after that i cant play with warrior gem "rolling slam". i ve tested it without any support gems and crafted a new gem of rolling slam - it didnt work! i cant choose them in my spell bar and in my skill window both gems dont show the dps (i opened the spell information and it shows me something about energy shield^^)

i am playing a mercenary with 408 str, so i have enough str for a lvl19 gem.

sry for my english ... its not my 1st language :)


edit:
i ve changed the order of my spells in my skill window. the spell information of rolling slam now shows me half of the information of "solar orb" :)

edit2:
after deleting all my weapon set skill points i can play with rolling slam again