Boutique and greek language issues.

I installed quickstart 1.7.3 and i tried to install greek language. Things gone strange
greek version works but when i click the english flag, a blank page opens with only the english flag.
the domain is http://www.cactuserp.gr/gk
I've read many tutorials and i cant think any more, thank you

Please make sure that you have 'Home' menu item for english language. How to configure multi language menu you'll find here >> http://wiki.gavick.com/questions/config ... oomla-1-7/

I did again the installation, i followed the steps but same problem. I created and published the english menu but blank page with english flag appears. I m new to 1.7 but i think i didnt miss any step
do you want the username and pass to check it?

the domain is cactuserp.gr
english version cactuserp.gr/index.php/en/
greek version cactuserp.gr/index.php/el/