Members here cannot use a custom avatar until reaching a minimum of 700 posts and 120 days in membership. Until then, there are site avatars for you to choose from. The selection increases as your usergroup is promoted.
You may, on the other hand, enjoy a signature containing a photo of your cat at any time. Here are instructions how to do so. Please let me know if I may be of any assistance.
I have deleted what you have up for your signature now. The photos cannot be any taller than 150 pixels and the total file size no larger than 30 KB. Your photos are each 80 KB, and the tall one is 250 pixels in height. Please visit our Signature Shop forum for help on a signature.