How can I get Marketplace in Pentaho 7.0?

Hi, I'm using the Business Analytic Platform version 7.0 from http://community.pentaho.com/

But in this system there is only a link for the marketplace...
http://www.pentaho.com/marketplace/

I downloaded a previous marketplace version and put it the path below
\pentaho-server\pentaho-solutions\system
And now I can see the marketplace option in the menu but it doesn't work, it shows different error according to the each old version that I used :(

I want to install Saiku to work with cubes.

In the website there is only "Saiku Chart Plus" but is not the option I´m looking for.

However, after downloaded the plugin how is the installation?

Can anyone please help me and tell me what is the correct way to install the marketplace?

Thanks