i installed successfully Primavera 6

1st ms sql server 2008

2nd primavera 6

3rd installed sql server 2005

DETAILS

Product : MSXML 6 Service Pack 2 (KB973686)

Product Version : 6.20.2003.0

Install : Failed

Error Number : 1603

Machine processor count: 1

OS version: Windows XP

OS service pack: Service Pack 3

OS architecture: x86

Process architecture: 32 Bit

OS clustered: No

Description: SQL Server Database Services 2008

ProductName: SQL2008

Type: RTM

Version: 10

SPLevel: 0

PROBLEM

Bad public user name or password. Database Server Error: SQL Network Interfaces: Error Locating Server/Instance Specified [xFFFFFFFF]. ;

username: admin

password: admin

username: pubuser

database alias: PMDB

Please Help, Thanks!