Summarize doesnt work on var table

thank you amitchandak 
I need distinctcount, so it worked with a bit of workaround

hi amitchandak 
got stuck again
it works like a charm when there is one measure to be summarized
but when I am adding additional column to be summarized it gives me an error

return groupby(UnitedTable2, [Site], 
                            [CalDate], 
                            "MonitoringsNum",COUNTX(CURRENTGROUP(),[CallIDString]),
                            "ComplCriticalScore",SUMX(CURRENTGROUP(),[ComplCrit Score %])
              )

It workins perfectly fine with COUNTX but SUMX gives an error 
"The CALCULATE function cannot be used in an expression argument for the GROUPBY function"

Please suggest.
Thank you