I purchased a Joomla professional template which is perfectly working. The problem is that when I update K2 to version 2.6.2. the K2 Elastislide module (used as a navigation gallery) disappear from the home page.

Can anyone help me ? Thanks.

Which version of K2 did you update from?
You will probably have to contact the author of the module and see when they are going to update it

Hello William,
Thanks for your reply.
The version of K2 I updated is v2.5.7 (From K2 "Information" tab).

The Elastislide module description field says:
K2 Elastislide module is a product of template-help.com team and a combination of K2 Content Module and Elastislide jQuery plugin.

I thought this module could be popular and maybe someone else encountered the same problem.
I'll try to contact the template-help.com team. Thanks once again.