First describe your problem specificly.
You've done nothing other than "help connection doesn't work".
What doesn't work? auth? game? what?
I'm sorry - but if you don't describe what you've done how the fuck are we supposed to get what's wrong?
Get on with the information, to narrow down possibilities.
Explain what you've done, what you've set, what goes wrong and where.
Everything.
PS:
Barring all ports, ODBC correctly setup - dbo.server is usually the problem.