Problem with expansion on EZkeys

Hello all,

I got a problem to add a new expansion for EZkeys installed. I´m using Cubase Elements 8, sometimes ago installed Ezkeys Gran piano and now I´m trying to add expansion for Ezkeys String machine.
Installation has success, run plug-in like a external and got both, Gran piano and String machine, and works perfectly. Problem comes when I try to use it on Cubase, open a new Midi track, add EZkeys and only show Gran Piano, without notice for String machine.

Someone could help me to solve this? I am sure that it is a problem with Cubase but needs your help to fix it.

Thanks in advanced