ERROR 29515 SQL SERVER 2005

Hola a todos,
cuando intento instalar el sql server 2005 sp2 x64 en el servidor con el
sistema operativo Windows Server 2003 R2 x64 me aparece el error que
indico más abajo. Lo he desinstalado y vuelto a instalar y no consigo
acabar la instalación. Alguien sabe como puedo resolverlo??

Muchas gracias.

Error 29515. SQL Server Setup could not connect to the database service
for server configuration. The error was: [Microsoft][SQL Native
Client]Shared Memory Provider: No process is on the other end of the pipe.
Refer to server error logs and setup logs for more information. For
details on how to view setup logs, see "How to View Setup Log Files" in
SQL Server Books Online.
<Func Name='GetCAContext'>
<EndFunc Name='GetCAContext' Return='T' GetLastError='0'>
Doing Action: Do_sqlScript
PerfTime Start: Do_sqlScript : Thu Mar 15 12:29:58 2007
Service MSSQLSERVER with parameters '-m SqlSetup -Q
-qSQL_Latin1_General_CP1_CI_AS -T4022 -T3659 -T3610 -T4010' is being
started at Thu Mar 15 12:29:58 2007
Attempt to start service when it is already running
SQL service MSSQLSERVER started successfully waiting for SQL service to
accept client connections
Service MSSQLSERVER started at Thu Mar 15 12:29:58 2007
Loaded DLL:
C:\WINDOWS\system32\Odbc32.dll
Version:
3.526.1830.0