Sametime 8.5: Can not find the Install Sametime Meeting Server portlet

I have installed Sametime 8.5 Beta3. Able to successfully send & recieve IM Mesaages.Problem:

Now I am trying to install meeting server. But in ISC → Sametime System Console → Sametime Guided Activities

I can not find the following option

Install Sametime Meeting Server portlet.

I find the following error on clicking the option install.product

CWLAA6003: Explanation: Could not display the portlet, an exception has occurred. User action: Check the server logs, there will be a warning message associated with this error of the form " while rendering a page…", this message will contain more detail of the error. Mostly likely cause is the console module as been uninstalled.

Thanks in adv