The database specified in the connection string {0} is not available from the RD Connection Broker server {1}. Ensure that ...

The database specified in the connection string {0} is not available from the RD Connection Broker server {1}. Ensure that the database server is available on the network, the SQL Server Native Client is installed on all RD Connection Broker servers, and the computer accounts of the RD Connection Broker servers are members of the RDS Management Servers group on the database server.