Hmm, try another font~
And make the font white and make it to soft light for example. When you want to add glow just make a little bit of it and make the glow somewhat blueish. Then duplicate the font layer and set the soft light to about 50% and take away the glow from the second one. This should look something like this.
Sorry, I took your sig for a sec but I needed to make sure how it looked before giving the advice:P
I used a font named Pristina and it looks pretty okay with that sig~
