AppleScript File not open with write permission error

I have an applescript that works perfectly on my local machine. It opens the file and writes to it and then closes. My Applescript is being tested and saved as a .app so it is an application. When I put the application on my server to test out the user experience it never propely opens the file and gives me this error:

"File not open with write permission.

Finder got an error: File not open with write permission. (-61)"

Why would this work on my local machine and not work after being downloaded from my server? I have tested that my path's are correct and like I mentioned everything works perfectly on my local MAC machine. Here is the section of my Applescript code that seems to be throwing the error:

set motionFullPath to ("" & pathEffects & "" & effectPlugin & ":" & theFolders & ":" & motionFiles & "") as string

  set myFile to open for access file motionFullPath with write permission
  set endOfFile to (get eof myFile) as number
  if result > 0 then
  set theText to read myFile
  set eof myFile to endOfFile
  write "<!--uuid:" & theURL & "-->" & return & theText to myFile
  end if
  close access myFile