Try formatting the date to dd-mm-yyyy, or mm-dd-yyyy, Microsoft Jet's date format. I'm not sure which one it is.
IntC = DCount("[CallType]", "dbo_tbl_DailyCall_Log", "[CallType] = 'Inbound' AND [CallDate] >= #" & format(Forms!Retriever![txtDate],"dd-mm-yyyy") & "# AND [CallDate]<= #" &...