Not associated with a trusted SQL Server connection.

I have added a new server registration and all is running fine for this new instance and the app that uses it.
However, I open QA and I connect to server X and run....

select * from y.myTable (Y is the new instance)
and I get the error...
Server: Msg 18452, Level 14, State 1, Line 1
Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.

Both servers have windows and sql authority.
I am logged on as myself and am a member of SA on both boxes.
Any ideas?
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QPRAsked:
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QPRAuthor Commented:
I fixed it!
Under server X security within linked servers, Y was listed. However it was listed as connecting under current security.
I checked another box and thatw as set to connect using the SA uname/pwd.

So 500 points to whoever can explain what that is and what I just did please :)
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GranModCommented:
PAQed with points refunded (500)

GranMod
Community Support Moderator
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