What is the best way to reach out to non-profit organizations to offer a business/fundraising opportunity?

I just recently started a company that offers a lucrative fundraising opportunity to non-profits, but I have had trouble getting through to the organizations decision makers. Most organizations (small to medium size) ume it is something like a candy sale, but it is simply a cause-related marketing opportunity at no-cost to their members or their organization. Any help would be appreciated.