Automatically Update User Titles & Ranks

[sn1p3r001]

Hi, everyone.

Currently I've got a number of ranks set up for a specific usergroup. For example, the settings for some ranks are as follows:

Rank 1
Repeat: 1
Usergroup: Member
Min Posts: 0
Stack: Yes
Display: Always
[Insert Rank 1 HTML here]

Rank 2
Repeat: 1
Usergroup: Member
Min Posts: 10
Stack: Yes
Display: Always
[Insert Rank 2 HTML here]

It was my understanding (correct me if I'm wrong) that when a user in the group "Member" hits 10 posts, his rank would automatically change to Rank 2. Currently the new rank is not displayed until I go into the ACP and run "Update User Titles and Ranks."

Is there any way I can set this to run by itself so I don't have to keep doing it? I'm running 5.0.3.

Thanks ahead of time.