Can any body tell me why?

[injured]

Rocky

I think most of u guys know this character and have played with it
yea its rocky by Trickityhouses.
but everytime i load this character, a box pops out and says cant create art surface: rocky_fury.

no matter what i do with that pic, the lf2 just wouldnt let me in.
but i really wanna try that character and especially that move (or i could have deleted it)
so can anyone tell me the reason and solve the problem? since you guys dont seem to have problems like that.
Thankyou