Forum Moderators: skibum
Who have you sent the mails to? Potential affiliates, potential customers, random email lists?
How much traffic are the affiliates bringing in? Have you done market research and determined what's the usual ratio of visitors to sales? What keywords are you targetting and what keywords are bringing you traffic? ( rhetorical question, no need to give us specifics here).
All of these questions are just some of the factors that need to be addressed.