I tried many times and failed.
Presumably you were expecting the "suggest a site" feature to automatically get your site listed in the directory. This is not the case. The "suggest a site" feature allows members of the public to offer a site for consideration, nothing more. In order for a suggested site to be added to the directory, a volunteer editor needs to take an interest in the category it was suggested to, and review the website. If the review is positive, and the site belongs in the category, the title and description then need to be checked (and rewritten if necessary to comply with our guidelines) and then the site is listed.
Since our editors are all volunteers and we get a lot of site suggestions to look at, the process above can take some time, and we are unable to offer any estimates for how long it will take an individual site to be reviewed. On top of that, adding new sites isn't the only thing that editors need to do develop and maintain the directory, and public suggestions aren't the only source of new sites.
As you've already been told, please don't repeatedly suggest the same site. Each time you do so, you need to agree that you've read and understood the submission guidelines. Presumably you missed the part of
http://www.dmoz.org/add.html which says:
multiple submissions of the same or related sites may result in the exclusion and/or deletion of those and all affiliated sites.
