Suchmaschinenfreundliche URLs problem

[inpeek]

Hello,

please, I need to help with modul SEO_light_Erweiterung. The url looks me as

http://www.myshop.com/Dámské-prádlo/Irall/Luxusn%ED-%BEupan-Roxane-2--5099.html

But it should be like this

http://www.myshop.com/Dámské-prádlo/Irall/Luxusní-župan-Roxane-2--5099.html

The mistakes are in this symbols: á,ì,š,ž,?,?,ý and the encoding the website is iso-8859-2

category url - ok
product url - bad
content manager -bad

I would be most grateful for your answer