Using the Database object in the postbit_display_complete hook

[dushan26]

I'm trying to select something from the database in the postbit_display_complete hook using the database object. I am able to successfully access it using the following syntax:

vB::$db->query_read_slave(...

The problem is I cannot use this syntax in vBulletin 3.7, and I want the product I am making to work in both versions. What I want to do is use:

$vbulletin->db->query_real_slave(...

However with this syntax I am getting the error, "Fatal error: Call to a member function query_read_slave() on a non-object in..."

I find this strange because I am able to use the $vbulletin object just fine in the newpost_process hook.

Any help would be greatly appreciated. Thanks in advance.