How can I advertise & grow?

[123456]

I want to make my business grow & make money a.s.a.p. Im into custom painting and designing for electronics, ( game consels & controllers, cases for iphone, ipad, cell phones, laptop faces ect. ) I posted some ads in craigslist but it's not really working. So if anyone can give me some advise to help me that would be great. Maybe tell me where & how to place ads., or check out my ad on craigslist & tell me what i'm doing wrong or how can I make it better. Or anything that will work. It's a small business, I just started, and I cant afford to put that much money into it yet, im 18 so I probably wont get approved for a loan or something. So I need ideas that cost little - no money. Any ideas? Here is the link to my craigslist ad http://dallas.craigslist.org/dal/vgm/3661547232.html