User blog:Baju05/Chain Shots in IES2013

Hi everyone. I really need some help with the chain shots in IES2013. I know how to do them but when for example i play with Shindou maxed with Nobunaga he has Fortissimo and Tetsuuna Boost as chain shots. How to perform the stronger one, because i always do the weakest. I tried pushing the shot button repeatedly but doesnt works. I tried the same with Kurama and he always does Sidewinder instead of the V2 Sidewinger. Is there some other button i need to press in order to perfrom the stronger shot? Thanks in advance.