Conditional Delete Folder

[dprice]

I've created a "Run Program" step that deletes a folder:

%DOSCMD% rmdir /S /Q %PROJDIR%\SomeFolder

I added a Conditional Build Rule to Build only if macro or expression:

[vbld_FSO.FolderExists("%PROJDIR%\SomeFolder")]

is equal to -1

However, it seems to ignore this condition. If I create the folder and run the step it works. If I run it again, the step fails. I used that shift-trick to evaluate the expression and it is working. This must be another case where I'm missing something obvious! Any suggestions?

Thanks!
Derek