Ledinax

I have problems with first part of challenge 3 (5B>5C>2C>214B). For some odd reason, I do 214C at the end instead of the B version (although i do press B doing the motion). The only way I have of doing it right is waiting some little time after the 2C, but then, obviously, it doesn't combo. What am I doing wrong? (Sorry for my crappy English)