The flames arent blended dont go well with the sig, the render could do with blending in more, try going round the render with the lasso tool with feather set to 10 - 15 px then invert the selection and press delete once or twice, whichever looks best and use a soft brush with lowered opacity at about 40 - 50 % and go over any unwanted bits and mess around with the blending options till u find what looks best. maybe add a lens flare to add some lighting to the sig.
Are you using tuts by any chance? if not it might be worth looking at some cuz they do help quite a lot when u start making sigs. take a look at some on here:
http://browse.deviantart.com/resourc...wse&offset=168
keep at it and you'll be making really nice sigs in no time.
