how to update bdb for openldap

[Coonay]

my ldap verions in widnows is 2.2.28
Berkeley DB version is 4.3.28,
in windows :
cmd>db_dump -f id2entry.dump id2entry
cmd>ftp id2entry.dump redhat.coonay.com


in linux:
#/usr/local/BerkeleyDB.4.7/bin/db_load -f radiaId.dump -h /var/opt/
ldap/ radiaId.bdb
db_load: line 2: unexpected format


how can i dump the bdb in window into linux?should i update the bdb to
4.7 in window in order for
that work?

thanks so much