It must be less than 640px wide, yours is 772px
It must be less than 150px high, yours is 438px
It must be less than 30kb in file size, yours is over 200kb
OK, this was a very difficult picture to work with, due to the fact that it's very blurred as well as really dark. I tried making you a signature with this picture in the size that is acceptable for TCS. I also worked on lightening and sharpening the picture. It is a LOT smaller than what you have but it is within the TCS rules.