Problem updating module from back-end

Hi,

I've tried to update this module from backend (either joomla 1.5 and joomla 2.5) but in updates tab compares only this message:

"Loading update data from GavicPro Update service..."

I remember that before compared the several updates.
Could you check it o tell me what is the problem?
Thank you

Please try to overwrite module files via ftp connection and check whether the problem still exist on updated version.

Thank you but where I can find the last version of this module? Either for joomla 1.5 and joomla 2.5?
Thank you