You'll be able to have a signature with a pic when you've been a member for 24 hours and have more than 5 posts. And it's a lovely pic! But you'll need to resize it first -- while the dimensions are fine, the file size is way too big -- the limit is 30 Kb.
Oh, and let me not forget to say "Welcome!" Drop in to "New Cats on the Block" and introduce yourself, OK? We'd love to meet you and your kitty. Hope you enjoy your time here.