MLA with shifted add

Hi all, I'm trying to use MLA instead of MUL and ADD in this case:
;v2 = v2 * v5 + v1<<8
mul v2,v5,v2
add v2, v2, v1, lsl #8

This two instructions works fine, but if I try this:
mla v2,v5,v2,v1,lsl #8
all get messed up :(

Does mla support shifts over add operand?
Thanks :)