Sounds like you need to enable remote connections. If value_in_use is 0 for this:
SELECT name,
value_in_use
FROM sys.configurations
WHERE name = N'remote access'
Then you'll want to log into the server again, from the local server, and run this:
EXEC sys.sp_configure
N'remote access',
N'1'
GO
RECONFIGURE WITH OVERRIDE
GO
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--Plato