Can we add two columns value to map Testcase Description in CFG file

Hi,

I am using ExcelImporter to export the testcases and requirements. I want to concatenate the values of column E and column F from the  excel testcase sheet and assign it to Testcase Description.  My cfg  file  contents are:--

testcase.XLSStartRow=8
testcase.dc:title=F
testcase.dc:description=E+F

It shows  error while  adding TestCases.  How can we concatenate two clumns value and map it to one properties e.g. to testcase Description.

Thanks-

Chandan