Hi, I bought you JoomSEF extension for Virtuemartm but I have a problem with paging products in cetegories

When I go to the second or other pages of category product list I still remain on the first page, and I see the list of products of the first page.

For example:
www.crom.hr/display-vendors/alati/knipex...garniture-alata/2/10
shows the same as:
www.crom.hr/display-vendors/alati/knipex-alati/garniture-alata

I used Virtuemart 2.0.20b
JoomSef 4.5.0 (NON Paid)
and your extension for VirtueMart (Paid)

Please, help