error installing sql 2005 express

I'm trying to install sql 2005 express in a W7 (x64) machine.
I've found next log error, anyone can help me?
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Service MSSQL$TEOWIN with parameters '-m SqlSetup -Q -qModern_Spanish_CI_AS -T4022 -T3659 -T3610 -T4010' is being started at Fri May 18 16:14:23 2012 SQL service MSSQL$TEOWIN started successfully waiting for SQL service to accept client connections Service MSSQL$TEOWIN started at Fri May 18 16:14:34 2012 SQL_ERROR (-1) in OdbcConnection::connect sqlstate=IM002, level=-1, state=-1, native_error=0, msg=[Microsoft][Administrador de controladores ODBC] No se encuentra el nombre del origen de datos y no se especificó ningún controlador predeterminado         Error Code: 0x8007ea75 (60021) Windows Error Text:   Source File Name: lib\odbc_connection.cpp Compiler Timestamp: Wed Jun 14 16:28:15 2006   &nbs ...