step script written in script editor doesn't work, why?

[ambalboa]

When I paste vbscript in the step tab of the script editor on certain steps, like a 'Group' or 'Delete Folder' action step, it doesn't go through and implement the script. When I paste it on the step tab for a 'Surround SCM' action step, specifically to do a checkout, it works. Why is that?

I want to add a line of vbscript (which I've already done) which updates a macro to know what group steps just started being build. That way, if a failure occurs, I can build the right undo checkout and also send that piece of information along with the e-mail notification of failure. I would prefer to update the macro as soon as the build process enters a group folder, and I though I could take advantage of the script editor to avoid adding another action step. Thank you for your help.