Using an "if not exists" command with a folder on an SMB share

Question

I'm trying to use an "if not exists" command on a folder which is stored on a mounted smb share..
This part of my script is supposed to check if a folder exists and;
If it does - Skip to the next part of the script
If it doesn't - Create the folder.
At the moment it either errors saying that the folder doesn't exist or doesn't create the folder.
I can get this script to work fine using local folder paths but I want to do it on an SMB share..
Here's my script.
Many thanks in advance.
Martin
set username to (do shell script "whoami")
set Media to " Media Files"
mount volume "smb://172.22.8.23/macmedia$"
tell application "Finder"
if not (exists ("smb://172.22.8.23/macmedia$/" & username as text) & Media as text) then
  make new folder at "macmedia$" with properties {name:(username as text) & Media as text}
end if
end tell
tell application "Finder"
set mnt to ("smb://172.22.8.23/macmedia$/" & username as text) & Media as text
try
  mount volume mnt
end try
eject "macmedia$"
end tell

Answer 1

Hi Camelot,
Thanks a lot for that the script's working as it should now..
I'm still having intermittent problems on some clients where it will only map the root volume "macmedia$" and freeze there.. This is a problem as they can then see and access everyone elses folders from there.
Do you know of a better/cleaner way to do what I'm trying to acheive? All i'm after is mapping an additional drive for student's so they can save larger files to our media server within their own folders.
Is there a way of checking if a folder exisits within an smb share without mounting the volume? Just trying to think outside of the box a bit..
Here's my new script;
set username to (do shell script "whoami") & " Media" as text
mount volume "smb://172.22.8.23/macmedia$"
tell application "Finder"
          if not (exists folder username of disk "macmedia$") then
  make new folder at disk "macmedia$" with properties {name:username as text}
          end if
end tell
tell application "Finder"
          set mnt to ("smb://172.22.8.23/macmedia$/" & username as text)
          try
  mount volume mnt
          end try
          eject "macmedia$"
end tell
Many thanks,
Martin