We have a shop

We use here the extention 'improved layered navigation'

with mturbo on all the url's in the shop are created perfect.
only the url's from 'improved layered navigation' not.

Without M-turbo the url's created are:

zoekresultaten/autoradio_s_2din.html

with mturbo on:

zoekresultaten/autoradio_s_2din.html?___store=english

here is the storeview included.

How can we solve this.