Installation Problem -- SQL Server 2005 Standard & Windows XP Professional Service Pack 2

Hi

I am trying to install SQL Server 2005 Standard on my laptop, which has Windows XP Professional with Service Pack 2. I could not able to install properly and i am getting error always. i tried whatever the people mentioned in Google, but I could not able to fix the problem. please some one can help my problem.

Here is the Error I am getting always "The certificate chain was issued by an authority that is not trusted" . I am trying for past few days i could not able to resolve.

please help

Note : I have SQL Server 2000 Client installed in my laptop. this is my development machine

Thanks

Paddy

Here is the Error message from Summary.txt

Product : SQL Server Database Services
Error : SQL Server Setup could not connect to the database service for server configuration. The error was: [Microsoft][SQL Native Client]SSL Provider: The certificate chain was issued by an authority that is not trusted.
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.

--
Machine : W4102762
Product : Microsoft SQL Server 2005
Product Version : 9.00.1399.06
Install : Failed
Log File : C:\Program Files\Microsoft SQL Server\90\Setup Bootstrap\LOG\Files\SQLSetup0001_w4102762_SQL.log
Last Action : InstallFinalize
Error String : SQL Server Setup could not connect to the database service for server configuration. The error was: {Microsoft}{SQL Native Client}SSL Provider: The certificate chain was issued by an authority that is not trusted.
Error Number : 29515
--
Machine : W4102762
Product : SQLXML4
Product Version : 9.00.1399.06
Install : Successful
Log File : C:\Program Files\Microsoft SQL Server\90\Setup Bootstrap\LOG\Files\SQLSetup0001_w4102762_SQLXML4_1.log
--

SQL Server Setup failed. For more information, review the Setup log file in %ProgramFiles%\Microsoft SQL Server\90\Setup Bootstrap\LOG\Summary.txt.

Please post this question where SQL Server Database Connectivity and Engine issues are discussed. You have better chance of getting an answer in those forums than Setup forum.

thanks

Raja