Hello,
Thanks for your answer, I try today and it's ok now !
I don't really understand because nothing change on my notebook (but windows remains a great mystery !!).
Maybe the fact your checked the files ?!
Thans again for the quick response.

<t>Hello all,<br/>
Since few days i'm unable to open my files in sweet home 3D online.<br/>
I worked for many months without problem but now [:(] <br/>
I tried with different PC with no success (windows seven family / windows XP )<br/>
<br/>
Does someone have an idea how to solve this problem ?<br ...