Problem with AppleScript inside automator app

Question

Creating an Automator Application that I want to run by itself (hence application instead of workflow). The firs thing asks for a folder, then it goes to run the following applescript, followed by some more automator applications and another applescript. Everything works perfectly when i run it inside automator, but when I run it as a standalone app it fails on the first applescript. Here it is:
on run {input, parameters}
     set aFolder to input
     tell application "Finder"
          set folderName to name of folder aFolder
     end tell
     set value of variable "SeasonNumber" of front workflow to "0" & ((characters -1 thru -1 of folderName) as string)
     return input
end run
I'm thinking it has something to do with the fact that I am setting a value to an automator variable (SeasonNumber) but not sure. If so, I have attached the second applescript in case something needs to be fixed in both. Thanks in advance.
on run {input, parameters}
set whichFile to input
set epNum to 1
set sNumber to get value of variable "SeasonNumber" of front workflow
repeat with aFile in whichFile
     if epNum < 10 then
          set ifZero to "0"
     else set ifZero to ""
     end if
     set textBox to "What is episode title for S" & (sNumber as string) & "E" & epNum & "?"
     tell application "Finder"
          set filename to name of aFile
          set nameEnding to ((characters -4 thru -1 of filename) as string)
          display dialog textBox default answer ""
          set text_returned to text returned of result
          set name of aFile to "S" & (sNumber as string) & "E" & (ifZero as string) & (epNum as string) & " - " & text_returned & nameEnding                    
     end tell
set epNum to epNum + 1
end repeat
return input
end run

Answer 1

Awesome. Figured since now it is just a ask for finder items and run applescript, might as well convert the whole thing to applescript and save as application in script editor. So the first thing is ask for finder items, which I have as:
set a     set aFolder to (choose folder with prompt "Select Season Folder" default location "afp://DiskStation._afpovertcp._tcp.local/Entertainment/TV Shows") as text
But I keep getting an error saying that it can't make it into type alias. What is the correct way of changing the default location to this? It is a Folder called TV Shows that is on my NAS, connected through afp. Let me know as I have tried putting POSIX file, I have tried Network/DiskStation/Entertainment/TV Shows, among other things. DiskStation is the server and Entertainment is a partition. Thanks in advance.