Sage 100 Premium - Connection to Crystal Reports

We run just the Financials in our SQL version of Sage 100.  Recently, none of my canned reports will run.  The error:

"The database login failed. Logon failed. Details [Database Vendor Code: 6]...Unable to connect: incorrect log on parameters..."

This only happens on my workstation.  All other users are able to function fine.  I do have a designer version of Crystal Reports on my machine, and no one else does. I am, however, able to open a Crystal report in design mode.   None of our user credentials work on my workstation, and my credentials work fine on other workstations.  So the problem appears to be the connection to SQL database from my workstation as far as reports are concerned.  The rest of my Sage app seems to work fine...I can do a vendor inquiry, look at chart of accounts, etc.  

Unfortunately, Sage tech cannot assist as they say it is a complex set-up with our sql environment, and they are not considered to have advanced knowledge in SQL.  

Anyone have knowledge of how and where to look for the connection to Crystal Reports from Sage?  It must be at the workstation level...and we've looked at the SQL Config Manager Utility...but perhaps we are missing something.

Thanks in advance.

Ana