Forum:How do I delete a uploaded pic?

Please help, I accidentally uploaded the wrong picture into the Clannad wiki and I for the life of me can't figure out how to sipmly delete the stupid thing. Could someone please help me as I am new to Wiki and would really appreciate the help? This is the link to it in case it would be useful to see my stupid blunder. I am sorry for the trouble.

http://clannad.wikia.com/wiki/File:Setsuna-00.jpg
 * Only administrators can perform deletions. You could ask one of them to delete it. 18:57, June 20, 2012 (UTC)

How would I go about doing that and finding out who the Admins for that Wiki are?
 * See this page. 19:03, June 20, 2012 (UTC)

Thanks for your help! I greatly appreciate your time and patience as well as kindness!