Error with Paginated Report connection to database from Report Server

Hello, 

I recently created an RDL using Report Builder and uploaded it to my Power BI Report Server. The report works perfectly on my local machine but does not run from the Power BI server. I get this error below. I think it is related to datasource but I am unable to resolve. I have tried to enter my details in the datasource section but it does not work.  

• An error has occurred during report processing. (rsProcessingAborted)
• Cannot create a connection to data source 'CRMUAT_MSCRM'. (rsErrorOpeningConnection)
• For more information about this error navigate to the report server on the local server machine, or enable remote errors 

Best Regards,

Simon