Marketpress Multiseller tutorial?

Hi there!

I’ve just bought Marketpress just for his amazing feature to let user create own shop and add their own products.

Just one problem….i tried and i tried again but nothing registred user cannot add product.

I’ve set up a multisite.

I’ve installed buddypress

I’ve tried to install capabilites and role manager plugins trying to solving this by assign role “add_products” to new “seller” role..but these rules (add_products, edit_products..) don’t appear on rules list.

Now…what i have to do? is there any tutorial about it?

I’m stuck on this problem and i can’t finish my work!

Thanks.

And thanks for your daily great job!