New from the Summit Group is an issue with Management Reporter – “An error occurred while retrieving balances from the source system provider.” along with a hot fix from Microsoft.
Management Reporter – “An error occurred while retrieving balances from the source system provider.” » Summit Group Software Blog
Microsoft & the GP EcosystemInstall, Upgrade & AdminReporting & BI
Archived post from 2011. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.