Problems with Stickies

Hi, I bought a Imac about 7 hours ago and its great. However I have a problem with stickies, they used to work fine to my knowledge. But now they are not on my desktop, I have the programme running and under 'windows' it says there are a few open called 'Untitled' but nowhere to be seen, and when I try to open a new sticky it just gets added to the list but without actually appearing anywhere, I rather hope someone can help, thanks.