XML problems: Execute and Input

[Nevox]

Dear all,
having some experience with Aastra phones, I made small application using the xmlBrowser of T46G phones. I'm facing 2 problems:
- using YealinkIPPhoneExecute, I cannot redirect to a new page (the page is called, the action is done - statusObject -, but the phone always show "Loading"). So, impossible to light a led AND show something on the screen without having to press cancel button.
- using YealinkIPPhoneInputScreen, the data filled are well transfered to the URL given in the xml, the following page are taken into account, BUT the phone come back to the inputScreen. So, once more, need to press some button to come back to the idle screen.

Do I made some errors while building the script? Do other users have those problems?
Best Regards,
Alban