The background has a nice effect going on there, but try to maybe blend in the render and your text but also give the text a little definition, the "see the light" part is a little hard to see and maybe give that thing a border if you work on those points it will be a nice sig, also if you could try give the background some depth and maybe some other effects alright though it has potential

EDIT: if you sent me the .psd file i would gladly touch it up and show you what points you need to work on instead of just saying then you can get a visual representation of those bad points you need to work on, if you couldsend it me i would have the sig in for you soon enough