List Field and Ask Dialog

[Magnus von Brömsen]

Hello

I have a List Field with some lines of text. When clicking a line I want 
the Ask dialog shown, fill in a number and have that number put in (with 
a tab) after the last word of the line.

1. This script in the Text Field works:

on mouseUp
   put tab & "1" after the last word of the selectedText -- the number 
"1" is an test
end mouseUp


2. But if I add the Ask-dialog:

on mouseUp
   ask "How many?"
   put tab & it after the last word of the selectedText
end mouseUp

I have this error:

Chunk: no target found
--------------------
put tab & it after the last word of the selectedText
--------------------
Value: mouseUp

I have tried a lot of different ways (clickText, clickLine, 
selectedLine...) but always the same error: "Chunk: no target found"

Anyone having a solution? An idea? All help will be appreciated!

Thanks.
Magnus von Brömsen