After migration to enterprise edition all my performace graphs don't work

Hi Andreas,
thank you for your very quick help You seem to be a realy “early bird” ;-).
The hint with the siteuser resolved the problem with cmk --convert-rrds.
Unfortunatly the data in most of the rrds (especially the Switchports) still stop at april 1st, the date, when i upgradet to cee.