Sometimes once all requests have been filled and completed for a certain amount of time the original poster deletes them. I may be wrong but I believe that deleted posts only stay for a certain amount of time. If it's been a while that could be an option for what happened.
You might want to add the Shortcuts widget to your page and each time you request something add it to your shortcuts. It will stay there until you delete it. :o)
at 1:44 PM on Apr. 21, 2009