how can I combine HFSS with Designer to design wg filter?

I saw some ppt of Ansoft which talk about designing waveguied iris filter using HFSS and Designer. In the ppt, We can use HFSS to simulate the basic module of the irise filter and add it in the Designer as a subcircuit . At last , using the optimetric of Designer , we can get the final physical dimesion of the filter. But in my software"Designer" , I do not have the menue "add HFSS NPort Design",so I can not add the HFSS project into the designer. Who can tell me the reasons ?
thanks in advanced!!!

May be you don't have a license for that particular feature.

-Arun

but I can not find it is needed to be linscenced.

Added after 4 hours 7 minutes:

who can tell me the reason?