Something like MLM (Multi-level marketing system) Referral Module: Track upline/downline and auto generate affiliate links

Hi,

I would need a module that supports the following:

For instance:

B clicks A's affiliate link to my website and joins (signs up) as a member. Once B has signed up, B(downline) will be placed under A(upline/referral). After a few days/months/years, when B decides to buy products or services, I'll then receive an order from B, I shall check who is the upline, which is A, and I will pay him/her. The commission will then be paid to A. The most important part is that I am able to track who is the upline, so that I could pay him/her.

In addition, I have used "ROLES" on my website as well. Meaning, ROLES ABC can buy ABC product. While ROLES XYZ can buy XYZ product. Therefore, customers will need to choose a "ROLE" to sign up before buying certain products. So, different sign up forms are provided.

What I want is simple:
1) Auto generate referral link to the affiliates
2) Able to track the downline easily from the upline
3) Able to track the upline easily from the downline

Please do let me know your offer. Or you can send me an email at dennis_loh39@hotmail.com