I have a little question concerning a site that im currently submitting to the engines. The site adress is: www.vins-france.com

The site is in JSP, and I think it's the reason why is giving me problems in Google and other SE.

If you perform a search in Google using the keywords "vins france" the first results is the homepage and the second is a sub page of the site.
The Homepage is indexed correctly . However the sub page indexed leads to a custom not found page. If I take a look at the adress of this second result, I think Google tryed to index the french section sub-page, but something wrong occurred.

This thing is happening in other SE as well. What can I do?