Telling them what to do is not enough. Particularly if you are telling to do things that you aren't doing. Take personal responsibility for your new distributors. If they are putting in the effort, reward them by giving them your time. Provide them with the knowledge and tools necessary to succeed, then help them get their first few checks.
Money is a real motivator.
Once their in the money, they will probably take off on their own. This will leave you more time to work with some other new distributors. However, don't forget your leaders. Even though they are doing well, they still need the strokes. Responsibly sponsoring will result in a loyal and active network.