Stop in /usr/ports/accessibility/atkmm because of sum is corrupted or not valid

Tue Jul 26 00:38:06 UTC 2011

===> Giving up on fetching files: atkmm-2.22.1.tar.bz2
Make sure the Makefile and distinfo file
(/usr/ports/accessibility/atkmm/distinfo)
are up to date. If you are absolutely sure you want to override this
check, type "make NO_CHECKSUM=yes [other args]".
*** Error code 1

Time last updated The FreeBSD Ports Collection: Tue Jul 26 01:07:56 WEST
2011 (GMT 0)

Greets!