SQL Server Express is being a real pain

Question

I've been messing with this SQL Server Express installation
since Friday and still can't get this application and database to
work together correctly. The program is written in ColdFusion, but
the errors seem to be permissions related to me but I just can't
figure it out.
I've created a user within SQL Server Management Express
program and all goes well. I then assign it as database owner for
the particular database I'm using. I've created the datasource from
within the ColdFusion administrator and it says the connection is
being made.
When trying to access the script, I get the error below.
In the SQL Management system I have tried everything that I
know to do - from adding this particular account as a user for the
"tUsers" table and giving it "Select" permissions to re-creating
the account and making it owner of the entire database. I tried
adding the schema to the front and surrounding the table name in
brackets [ ].
The database was restored from a backup on another server.
Would that cause problems at all? I just tried deleting the
database, creating it again, then restoring it from the file and
setting the owner as this user during the import process. I'm still
not having any luck though.
I've searched Google and almost every result is a forums post
from people having this same problem who have fixed it by giving
the account permission to access the database and/or table. For
some reason that isn't working for me - or I'm an idiot and missing
something.
Does anyone have any ideas?

Answer 1

At first, no, I couldn't perform any queries at all against
the database.
I fixed the problem by editing the "server" in the CF admin
for this datasource and making it:
localhost/SQLEXPRESS
CF Admin says it doesn't verify, but if I attach the username
and password to each CFQUERY statement they work!
Very strange problem. I'm not sure if this is a 'feature' or
a known bug, but I don't see any reason why that connection doesn't
verify. Especially since if it would've I could have saved myself
countless hours of work.
Oh well - thanks everyone for your suggestions and
help!