Signup Credits not working

I enable the classified plugin and i enable the use credits under the payments section with the following values:

Enable Credits: tick
Cost Per Credit: 2.00
Credit Per Week: 1
Signup Credits: 2

I also enable the Buddypress plugin and the credits appear in the bp menu.

I created a dummy account and register with my site but I noticed the credit is 0 value in which should be 2 credits.

Did i miss something in the settings?

Need help.