<docbook><section><title>SQLServiceUnavailable</title><para> </para><title> Error Message: Unable to connect: SQLServer is unavailable or does not exist (20009) </title> Error Message: <computeroutput>Unable to connect: SQLServer is unavailable or does not exist (20009)</computeroutput> 
<para>The most common causes of this error are --</para><itemizedlist mark="bullet" spacing="compact"><listitem> an incorrect value for the target SQL Server (Microsoft or Sybase) hostname or IP address </listitem>
<listitem> an incorrect value for TCP/IP listen port for <ulink url="HowDoIFindMySQLServerListenPort">Microsoft SQL Server</ulink> or <ulink url="HowDoIFindMySybaseListenPort">Sybase</ulink> </listitem>
<listitem> an incorrect value for the target Microsoft SQL Server <ulink url="HowDoIFindMySQLServerInstanceName">Instance Name</ulink></listitem>
</itemizedlist><para>If you are certain these are all correct, check <ulink url="http://support.microsoft.com/kb/328306">Microsoft&#39;s Knowledgebase Article</ulink> on this error message.</para><para><ulink url="http://support.openlinksw.com/support/online-support.vsp">Come back to us</ulink> if that doesn&#39;t provide the solution.</para><para> </para></section></docbook>