Passing Variables As Arguments To Execute Process Task?

I am running my "execute process task" in a foreach loop that uses two variables (file paths) from the recordset that feeds into it.

My executable line looks like this: C:Program FilesWinZipWZZIP.EXE ,
which runs the command line Winzip executable and my argument line looks like this: -rp @ZipArch @ZipTxt.

When I replace the variables with literal strings, the process works (only once, of course).

My Argument won't parse in the expression editor, nor does the process run when embedded in the foreach loop. What am I doing wrong? Thanks for your help.