NRS activation problem for IMSS 5.7

Problem:
My customer is still using IMSS 5.7 build 1121 on Windows 2000. No plan to upgrade yet since the hardware is of low specs. Recently he activated the NRS. Upon saving the changes, refer below for message that he received:

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The configuration changes have been saved.

However, local DNS server seemed not responding to DNS A-record query for Network Reputation initialization test in time and timed out. As a result, Network Reputation during scan may not be functioning properly. Although mail flow will still continue, it is recommended to follow manual's instructions to troubleshoot, reconfigure and tune local DNS server before fully utilizing this feature.

Some possible reasons may lead to this testing failure are listed here as reference and please refer to manuals for further information:

1. Local DNS server can not respond to A record query.

2. Local DNS server can not look up its root DNS server for sub-domains of a.mail-abuse.com.

3. Slow response from local DNS server and/or intermittent networking connectivity for outgoing DNS queries.

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Solution:
Do the following;

1) Stop all IMSS services.

2) Look in the IMSS folder then backup and delete the following files.

licenseprofile3.dat is for NAS
licenseprofile4.dat is for RBL+

You might night not have both files. Just delete these two files if you see them.

3) Restart all IMSS services

4) Enter the NRS Activation Code again.

Open the GUI and click 'Configuration'
Under 'Configuration', click 'Product Licenses'
Under 'Network Reputation Services', click 'View license details'
Enter the NRS Activation Code.

Under 'Configuration', select 'Network Reputation'
Check the box next to 'Enable Network Reputation Service'
Under 'Action:', select 'Default intelligent action'
Click 'Save'