Thank you for all responses i have figured out the reason. I think i should post here so it will save time for someone else later. The reason is i did not create the user in the sql server i thought that if i give myself the administrator right then i should not have any problem to connect to server. However as i use the system DSN so when it connects to sql server it use the IUSR user instead of me. So to fix that just create IUSR user account in sql server

In reply to Re^4: Data base connection error by mhoang
in thread Data base connection error by mhoang

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