By default, the Computer Browser service is disabled in Windows Server 2008. Ensure the Computer Browser service is started and is configured to start automatically at that specific Domain Controller (DC) server (not the BCAAA server). DCQ does not work unless the Computer Browser service at the DC server is enabled. Client query should work without the Computer Browser service enabled.
BCAAA uses NetServerEnum to locate servers in a domain, and this call failed as per the log file:
2010/06/03 05:48:47.718  [2852:2996] Cannot find domain controllers for domain YOUR_DOMAIN_NAME.; status=6118:0x17e6:The list of servers for this workgroup is not currently available
Error 6118 == ERROR_NO_BROWSER_SERVERS_FOUND
Note the following quote from the remarks section:
"The NetServerEnum function depends on the browser service being installed and running. If no browser servers are found, then NetServerEnum fails with ERROR_NO_BROWSER_SERVERS_FOUND."
Apply BCAAA from 22.214.171.124, 126.96.36.199 or 188.8.131.52 or their later version.
In these versions, the BCAAA WINSSO DC query component replaces the NetServerEnum calls with DsGetDomainControllerInfo so it no longer depends on the NetBIOS Computer Browser service. This allows it to discover all DCs in the domain, query DCs for user logon session information, and acquire usernames and IP addresses.
To do this, install BCAAA as usual (see the release notes for details). After installation, double check the SSO.INI to ensure the existing settings were preserved.