Monitoring by snmp, oid missing

I try to monitor a distant Notes server with the snmpwalk command line. According to the 6.0 version of the mib there are 34 OIDs for mails but I only get results for the 1st, 3rd, 4th, 5th, 6th, 7th, 8th, 18th, 19th, 20th, 21st, 26th, 27th, 31st and 34th OIDs.Is it normal? How can I get the results on the missing OIDs?