I tried loading on a new avatar but it kept coming up with an error message saying either "Invalid Image" or "Unable to save avatar".
The resolution of the avatar is 99x100, i also tried saving it as a 90x91 but it didnt work either way. I tried saving it as a jpg, tga and gif but it still isnt uploading. does this mean im stuck with my old avatar?

Try dling the image then upload it from your computer to www.imageshack.com or www.tinypic.com and use the link it gives you.