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I am trying to login to SQL server 2005, and it gives me an error 18456..

This is very funny...I go to advanced option and set network protocol as TCP/IP it does not work..if I leave it as default it works....

I remember we user TCP/IP authentication....why is this an issue ?

migrated from stackoverflow.com Aug 19 '09 at 6:47

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Maybe TCP/IP is not enabled on your server? Check out this website for more information.

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