After you install SQL Server 2005 RTM on windows server 2008, the full-text search service cannot start. This is because the full-text search service depends on the NTLMSSP (NTLM Security Support Provider) service but the NTLMSSP service does not exist on Windows Server 2008.
To resolve this problem, simple install SQL Server 2005 SP3
SQL Server 2005 SP3 can be downloaded from http://www.microsoft.com/downloads/en/details.aspx?FamilyID=ae7387c3-348c-4faa-8ae5-949fdfbe59c4
