Firstly we really are getting into support territory here for which Novell's forums would be much more appropriate.
A forum has been created for Kanaka and is available at forums.novell.com/.../ whilst there's also forums.novell.com/.../ if you have a query about AFP and/or CIFS.
You haven't said which version of OES you're using but if using OES11 or OES2 SP3 with November 2011 patches installed then you have a version of AFP that supports DHX2 as introduced with OS X Lion. What you might not have is the DHX2 UAM enabled so you need to configure that via AFP in iManager or by editing /etc/opt/novell/afptcpd/afptcpd.conf and setting AUTH_UAM to DHX2.
If this doesn't resolve your problem then I suggest visiting one of the above support forums and posting a message giving more details.