After migration to Joomla 2.5 Avatars were lost

Hi everybody,

i just updated my Joomla from 1.5 to 2.5 using the jupgrade component.

Then i installed a fresh community builder 1.8 to the new joomla and run all the database-tools in cb.

Now the users are there but all avatars / gallery images were gone

I looked in images/comprofiler and the pictures were there but nothing is displayed in the page

thanks in advance