When to re-submit a site?

I have submitted my website at the beginning of this year. Obivously I was hoping for inclusion in the directory, but I don't know if I have been rejected (and for what reason) or if it is still awaiting review. If I have been rejected, when I can resubmit my website for review?
Many thanks for any replies in advance.

There are 2 posiblities.

1) and most probable, your site is still waiting review, no need to suggest it again, one more suggestion won't harm you but it could make the time you will have to wait before review longer
2) the site is rejected, no need to suggest the site again a rejected site is not lisatble [one exception, if you suggested a site that was under construction - but you have been told not to suggest such a site - and now you finished building the site you could suggest it again] Reasons why a site won't be listed can be found at http://dmoz.org/add.html and http://dmoz.org/guidelines/include.html

Thanks for your reply.