ADO Error on Integration Manager

I was trying to open a data in MS Dynamics GP with Integration Manager but I received error.
And after playing around with some things, and close GP and reports, I closed Integration Manager and tried to re-open again, but the error is still re-appearing.
How can I fix it?

Integration Manager
The following problem occurred while attempting to open Query ‘Inventory’:
-ADO Field is nothing.
ADO Field is nothing.
