AD bulk export  and Import Group and members ldifde

Windows 2003 AD
I am trying to create replica of my production AD environment. domain.com to Domain-it.com
I need to bring over the security groups and distribution lists with mangers. Using ldifde i was able to bring over the OU structure and users, but I need to bring Groups with member and memberof
Here is the export command that I used but import fails with numerous errors
export command
ldifde -f c:\temp\DistGroups.ldf -s dom01 -d "ou=groups,dc=domain,dc=com" -p subtree -r "(&(objectClass=group))" -l "ObjectClass,name,sAMAccountName,groupType,member,managedBy,mailNickName,mail,cn,displayName"
Import fails with constraint violation ..etc  
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