hm....well it might just be an issue of timing. You might be executing the HS of the VV before Sol actually recovers since there is recovery time even while he lands after doing the VV.
I tired it out n stuff and ran into a similar problem with executing the attack too soon after Sol landed from the VV and the input display shows the input that didn't execute the VV.
[i'm running GGXX#R on my windows vista laptop. Using PS2 Dream adapter and PS2 controller]