i need a referral script...where user can sign up and script provide him witha url to give to other people...and when a person signup using that link one credit will appear in the members index page whose link has used ...

user will have two functions free and paid signup...

i jaust want that script shows how many members had joined using the link of a specified user.....

NOTE:there are many scriots which gives user %of sales they made....but i want just a referral script so that they can have chain of user under them