[TYPO3-english] problem after update to 6.2 with extension

[Andreas Pfeiffer]

hi,

i have written an extension based on extbase, fluid and namespace.

everything worked with TYPO3 6.1.7

after the update i get the follwoing message

http://relaunch.crazy-twins.de/projekte/ajax.html?file=sidebar

"*Could not find class definition for name
"Ct\CtGallery\Domain\Model\Picture". This could be caused by a mis-spelling
of the class name in the class definition.*

TYPO3\CMS\Extbase\Persistence\Generic\Exception\InvalidClassException thrown
in file
/var/www/vhosts/
crazy-twins.de/httpdocs/__relaunch.crazy-twins.de/typo3/sysext/extbase/Classes/Persistence/Generic/Mapper/DataMapFactory.php
in
line 102."

has someone a hint why?

thanks.