pkg_delete: package 'xorg-drivers-7.3' doesn't have a prefix

[Mon Si]

Dear list,

I'm experiencing problems when I try to portupgrade the xorg-driver
port. The old version of the port can't be uninstalled during the
portupgrade due to an undefined prefix.
The port can't be deleted by "pkg_delete -f xorg-drivers-7.3"

Does anybody know how to upgrade / remove this port?

Thanks in advance,
	Simon
-- 
Der GMX SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! 
Ideal für Modem und ISDN: http://www.gmx.net/de/go/smartsurfer