Budget. The old music business adage is "It takes money to make money." If you can save some coin for awhile until you can put together an actual promotional campaign-- web ad impressions, e-mail blast(s), terrestrial and Internet radio, and reviews in high-profile publications (print and web) for your genre... You might see more action. But all of that costs money and often needs the touch of experienced publicity and promotion pros. If you want to DIY it, plan to take things slow and steady, and scale back your expectations a bit.
GJ