Open a folder

this works, it opens a project folder within a category folder:

set y to (do shell script "open '/volumes/Features1/" & the_cat & "/" & UpperCase & " '*")

this will not simply open the category folder:

set y to (do shell script "open '/volumes/Features1/" & the_cat & "/")

any ideas, I am running this in Applescript.

---------- Post updated at 08:05 AM ---------- Previous update was at 07:55 AM ----------

I did it the old fashion way and it works fine and is fast

open folder ("Features1:" & the_cat) as string