Error building ASN.1 representation (Can't build OID for variable)

[kalons]

Dear All,

I use SUSE zabbix version 2.0.6.

I added LexMark printer's official MIB into SUSE system.

- I can get correct result use snmpwalk with LexMark MIB string.
such as:
snmpwalk -c ZABBIX-SNMP -v 2c XX.XX.XX.XX LEXMARK-MPS-MIB::currentSupplyDescription.1.1
LEXMARK-MPS-MIB::currentSupplyDescription.1.1 = STRING: Cyan Toner

- I deploy it in zabbix with new MIB string (eg. LEXMARK-MPS-MIB::currentSupplyDescription.1.1) in "SNMP OID" field when create Host Items.

But it shows:
Error building ASN.1 representation (Can't build OID for variable)

What should I do to solve this?
Thanks!!!