Login failed for user ‘…’. Reason: Not associated with a trusted SQL Server connection

Just got my new development computer set up, here is the machine information:

Dell PRECISION 380 Workstation
CPU: Pentium 4 3.4GHz
RAM: 2GB
Hard drives: 2 X 250GB with RAID controller
Video card: nVidia Quadro FX1400 dual head support with DVI output
DVD ROM and DVD-RW ROM
Monitor: 2 X Dell 19″ Flat Panel

I had been working on it in the past few days to get it set up and to transfer files from my old computer to the new one. Then, when I tried to load one of my web applications, I got this error message:

“Login failed for user ‘…….’. Reason: Not associated with a trusted SQL Server connection”

How come I always forgot to change my MS SQL Server’s authentication mode to “Mixed” mode (aka, SQL Server and Windows) before I run a web application. I guess I was just too excited about this new machine.

How to change MS SQL Server’s authentication mode? (assume SQL Server and IIS are on the same machine)?

  1. Run MS SQL Server Enterprise Manager
  2. Right click on the interested server and choose “Properties”
  3. Under “Security” tab in the SQL Server Properties window, change Authentication type to “SQL Server and Windows”
  4. When prompted, click “Yes” to restart MS SQL Server
  5. You are ready to go

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