Infopath- trying to saving two columns data into single col

Question

Hi ,

 

I have infopath form in which there are 5 columns and i trying for which 5 columns are store in single column woyld be display in SP list.

 

i have createda calculated control variable , which is not visible in form. on Calculated Control i have applied rule Action->Set a field's Value->(under field selected That variable only)->value: concat(col1,col2,col3,col4,col5)

 

In infopath i click on file -> Form option-> Property Pramotion-> Add->selected the variable-> Rename it->Saved

 

There is no error in formaule but please let me know where i did wrong. and which column name under all 5 columns values will be display?

 

Thanks in advance.