Problems with q-translate

Hello,

I’m using plugin restaurant reservation since one year and it was perfect until this summer we decided to translate the web in spanish. So we installed q-translate and we trasnlate the web into catalan and spanish and then the plugin didn’t work no more. The date of the resartion in the notification email was always wrong. So I decided to unistalled the q-translate and it works perfect again. But I need the web in two languages, so, what plugin you recomend me?

Thank you

The page I need help with: [log in to see the link]