Honestly I think your request is a bit crude. I sent out about a dozen fee waiver requests and found that the best way to get one is to make it sound like they're the school for you. I mentioned certain aspects, programs, clinics, etc. I was excited to be involved in and that I needed a little bit of help in applying to their school. Do some research. Mention your GPA and LSAT and then go into a little bit of detail about why they are your number one choice (even if they're not).
You have no idea how receptive adcoms were to my requests. W&M, Wake, Emory, and Stetson all responded with personal emails giving the waiver code, encouraging me to apply to their schools, and describing the programs I mentioned I was interested in.
The more personalized your request the better. I'm guessing they receive an assload of generic "please help me because of X" emails and they aren't really impressed. If you can show them that you are genuinely interested in their school, you have a much better shot.
No offense to how you sent your request, but most ppl I know who requested waivers from the first three were given them, no matter how "crude" the request.