it lists?
the script editor?

I don't see mismatch in quotes or any faulplay.
I suggest you run the script again without any editors via console and add some basic debug code, as example:

 Code:
     ;/Mappings Based on Group Memberships
      IF InGroup ("Wor-MyWorkOffice-Loans")
? "in group loans"
	USE I: "\\server-fs\common\01-Loans"
? "use returned error: " @error
else
? "not in group loans"
      ENDIf
sleep 4


etc, to see what it really does.
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