Its an ok sig. The colors all match up. The effects, white in particular look like they were just thrown on top of the render. Throw some gradient maps on top of there or even put it in B&W. Get some more lighting going on. Maybe some more effects to identify the flow more and smaller text w/ different font. Your getting there, you just need some more things.
Thanks a lot for the review. I will work on the lighting and make the text smaller. About the flow, I will try my best. I am not an expert on making signatures but I will try to do a better sig.