using secondary sidechain input

My question is regarding Fxpansion Etch. This plugin has a secondary side-chain input which is the plugin’s input 3-4. The plugins manual says that this side-chain input is host dependent and that not all hosts are capable of allowing access to the side-chain input. Is it possible to access this side-chain input when using Cubase 6 Artist? I can’t find anything in Cubase manual about the implementation of multi-input plugins.