>>Note that sometimes you can get the red squiggly underline because of the intellisense cache
>>
>>So again...what is the error message you're getting?
>
>The error is that the AnotherDb..MyTable2 is invalid object. And the column names have squiggly underline.

And you're positive that you have a table called MyTable2 in another database , and that it's under the default schema of 'dbo' ? (on the same database server)