how we can change user ranks automaticaly

[nomoreturn]

Hello every one i serched alot but didnt find any thing i want to know how we can change user ranks and title automaticaly i mean to say that i have setting like this

500 post special member and after that 2000 post VIP member and then 3000 post Precious member

i make spicial member , vip member an precious user group and make and also make ranks and title for same member groups but they are not changing i also update user titles and ranks in admin cp but titles and ranks not changing please help me how to fix this thanks in advance

[James Birkett]

Create promotions, and create different usergroups for each rank.
Special Member Usergroup
Special Member Rank used in conjunction with the usergroup (select it on the Add New User Rank).
Same with VIP, Precious Member etc.

[nomoreturn]

Thanks got it