MailScanner not doing RBL Checks

[Fadotek Solutions, LLC]

I just setup a new server running MS 4.28.6

Everything is working great except for some reason it's not doing RBL checking. Usually I see log lines with RBL checking in there, well now I don't see those log entries anymore on this machine. When I turn on RBL Checking in SA and running in debug mode I get the following:

Mar 28 06:24:08 mail01 MailScanner[13322]: RBL Checks: returned 0
Mar 28 06:24:09 mail01 MailScanner[13322]: SpamAssassin returned 0
Mar 28 06:24:09 mail01 MailScanner[13322]: Message i2RKO3Zw013330 from 65.164.80.111 (repairyourcredit at alluringads.com) to ccinet.com is spam, SpamAssassin (score=5.471, required 5, CLICK_BELOW 0.00, RCVD_IN_BL_SPAMCOP_NET 4.00, RCVD_IN_RFCI 0.10, RCVD_IN_SBL 1.27, RCVD_IN_SORBS 0.10)

So it looks like MS is not doing RBL checks but SA is doing those checks fine. Any ideas?

-Jeff