Error in migrating MS Dynamics GP

I am migrating from Microsoft Dynamics GP 9 Service Pack 3 to MS Dynamics 2010 R2 for building a test environment.
When done with the upgrade, I logged on to GP but received the error below:

Microsoft Dynamics GP
You’re attempting to log in from a data source using a trusted connection. Update the SQL Server settings for this data source to disable trusted connections and try logging in again.
Have I missed something during the migration?
Kindly please send me some ideas.
Thanks.
