If the approach you are using is not working then I would respectfully suggest that you change your approach.
You need to look at where you are advertising and the type of ads you are using.
There are so many places to advertise on the internet it is easy to think all you have to do is put the adverts out and someone will reply to them.
Try to match your advertising to the group of people the advert is going out to. Let's face it there is no reason not to sign up to a free program. The getting them in should be the easy part, it is the convincing them that they have joined a real business that to be most successful requires a little investment of both time and money that can be a little trickier.
Are you sure you haven't missed anything in the training that can help you with attracting new affiliates. If the worst comes to the worst I would suggest getting some PSA's to go or joining the S Builder if you are having trouble recruiting.
Speak to your upline, see if they are experiencing the same problems as you. If they are not then seek out some advice from them.