permissions for gk4?

www.prezikai.lt/index.php to see the problem - all the way something like this:

modules/mod_news_pro_gk4/cache/k2.items.cache.1698b847c2e4fe98c05adcdc9d420590_Lnsp_100.jpg' for writing: Permission denied in /home/virtualus/domains/prezikai.lt/public_html/modules/mod_news_pro_gk4/gk_classes/gk.thumbs.php on line 175

I understand that it is related to permissions (?) but couldn't figure out where.

Fixed: permissions must be 777 not for /cashe directory only, but for all files also.