Hi Panagiotis,
Sorry for the really late reply to your message. I didn't see it until now that your colleague has replied to you.
Usually once you upload a sequence into the LAMS Community, we check the content you have upload to ensure that is appropriate and once we do, we allow the preview option.
It takes about a few hours to do this, so just bare with us for a little bit while we do the checking.
Thanks for sharing sequences!
We are currently have well over 1750+ sequences in 7 different languages from all sorts of educational subjects!
Ernie
Posted by Ernie Ghiglione