SNMP OID index not return the OID value

I use the SCTE MIBs. The property table has the OID index. I have registered the table and can get the parameters, but value of parameterOID returns the 0.0. The index if right. I have debug the program, see the resultBuffer is the array of the OID. But it shows the 0.0, not the array of the OID. What is the reason? thanks

Such as the parameter OID index is, so the value should be, but not 0.0.