old objectclass format not supported

["Jeff Neuffer Jr." <jneuffer@nstel.com>]

I'm running OpenLDAP 2.0.11.
I'm trying to include an addidtional schema file (with radius
attributes) and when I do I get an error message that says,

"Dec 20 15:41:30 radius00 slapd[1049]:
/etc/openldap/schema/slapd.user_oc.schema: line 797: old objectclass
format not supported."


I checked /etc/openldap/core.schema and compared it to the one I am
including in my slapd.conf file.

Here is a sample of the differences,
--- From core.schema,

attributetype ( 2.5.18.1 NAME 'createTimestamp'
	EQUALITY generalizedTimeMatch
	ORDERING generalizedTimeOrderingMatch
	SYNTAX 1.3.6.1.4.1.1466.115.121.1.24
	SINGLE-VALUE NO-USER-MODIFICATION USAGE directoryOperation )


--- From slapd.user_at.schema,

attribute aaaCheck		2.16.840.1.114199.1.1.1		cis


I assume these are different LDAP versions?  If so, is there a tool that
can convert from one format to another?  If not, will OpenLDAP (2.0.x)
accept older LDAP protocol versions?

Thanks,
Jeff