[imp] after Upgrade from 5.0.2 to 5.0.3 cant login to imp

[norbi]

Hi List,

with Horde 5.0.2 all was working fine, it was possible to directly login 
to imp. Then i have done upgrading Horde to 5.0.3 via pear, and now i 
only see

HORDE: User is not authorized for horde

any hints ? Or where can i set a more deeper debuglevel to discover the 
problem?

Norbert