How to make Products to look like feature products with sliders

I’m using flexi shop

Here is the code I pasted as my short code on the homepage HTML box:
[prima_products title= image_width=”128″ image_height=”220″ number=”7″ slider=”yes”]

also

[wpsc_products category_id=’21’ number=”7″ ]

but the only time I see the fade on roll over and the arrows is when I check “Show Featured Products on the theme settings.

or is there a way to display a specific category in this code? (All I ever get is most recently uploaded items)

[prima_products title= image_width=”128″ image_height=”220″ number=”7″ slider=”yes”]