Problem to keep plugin in a tour on iPhone.

Hi,

i've a problem to get a functionnal tour on iphone (can't really test on android). The sound plugin button (leftbottom) doesn't stay in the second scene (keep="true" of course). I can't use the KEEPPLUGINS flag because i don't keep every plugins. It's the first time i do a dedicate xml to mobile and tablet devices, may be i did something wrong. Can't find what!
Here the link (sorry for long url, i don't know if we can insert a QRcode here):
http://www.360-vision.fr/panos/communes…ardo/index.html

If anybody met the same problem thanks to let me know.
Steph.

Thanks Klaus.