DeprecationWarning

hi
basically i installed a new operating system Ubuntu 9.10 then i downloaded openerp server , client and installed all it's dependencies
now i want to restore a database but when i restore a database it's gave me an error "Couldn't restore database"

and on server log it show's the following error

/home/alam/Desktop/Data/server/bin/tools/misc.py:750: DeprecationWarning: BaseException.message has been deprecated as of Python 2.6
 if hasattr(e, 'message'):
/home/alam/Desktop/Data/server/bin/tools/misc.py:751: DeprecationWarning: BaseException.message has been deprecated as of Python 2.6
 return ustr(e.message)

and let suppose after these messages when i connect that database it is
just like fresh database installed no previous data no menu's nothing

what could be the problem ?????