AJAX and construct 2 app

hi all,

i made an app with a text object, the text object show external files with the ajax plugin.

in my app i have differents butons and i put: on start of layout ajax request link to the "txt" file.

on request"" complete the text file shw the right result

but its very slow why??? some time i need to click 3x4 times or do a F5 on the browser to see the right text.

it is possible to clear the cache when the app is closed with this?

<meta http-equiv='cache-control' content='no-cache'>

<meta http-equiv='expires' content='0'>

<meta http-equiv='pragma' content='no-cache'>