Delete Multiple Files in ColdFusion

I have a verity search and I am updating the search so that when I run a specific file it will delete any existing contents of the searchfile directory (all .txt files), then recreate them and index them.  The problem is with trying to delete all of the .txt files in the searchfile dir, when I run the statement below I get an error, any help would be appreciated

<cffile    action = "delete"
              file = "#searchFileDir#\*.txt"  >Start Free Trial

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<cffile    action = "delete"
              file = "#searchFileDir#\*.txt"  >