Using a #Temp Table in a SQL Server Stored Procedure and using it as a SSRS Dataset

I am trying to use some #Temp Tables in my SQL Server Stored Procedure and then ultimately within the Dataset in my SSRS Report. When I attempt refreshing my fields it is taking FOREVER!

Now I did see some reference to using the following SQL...

IF 1=0 BEGIN

SET FMTONLY OFF

END

http://stackoverflow.com/questions/26868915/issue-with-ssrs-report-with-temp-table

Apparently using #Temp Tables in a SQL Server Stored Procedure and then with SSRS Dataset don't play very well together.

Can anyone add to this and point me in the right direction perhaps?

Thanks for your review and am hopeful for a reply.