Hi, I'm trying to make my first build, following the instructions from:

http://www.gumstix.net/Software/view/Getting-started/Setting-up-a-build-environment/111.html

After I write this command:
$ bitbake gumstix-basic-image
I get the following list of errors:

NOTE: package bison-native-2.0-r2: task do_fetch: started
NOTE: The MD5Sums did not match. Wanted: 'c17f964fd5504b88b07a183420de25e3' and Got: 'd41d8cd98f00b204e9800998ecf8427e'
NOTE: Task failed: Checksum of 'ftp://ftp.gnu.org/gnu/bison/bison-2.0.tar.gz' failed
NOTE: package bison-native-2.0-r2: task do_fetch: failed
ERROR: TaskFailed event exception, aborting
NOTE: package bison-native-2.0: failed
ERROR: Build of /home/micros/gumstix/gumstix-oe/org.openembedded.snapshot/packages/bison/bison-native_2.0.bb do_fetch failed
ERROR: Task 915 (/home/micros/gumstix/gumstix-oe/org.openembedded.snapshot/packages/bison/bison-native_2.0.bb, do_fetch) failed
NOTE: Tasks Summary: Attempted 58 tasks of which 58 didn't need to be rerun and 1 failed.
ERROR: '/home/micros/gumstix/gumstix-oe/org.openembedded.snapshot/packages/bison/bison-native_2.0.bb' failed

Is there an obvious problem with this procedure or am missing anything here ?

thank you,

Mark