Mibs configuration

Hello, I have some issues configuring Mibs from a getaway.....I have the mibs from the vendor and when I test it on the mib browser it seems to work fine. However I get a table and I want to monitor a specific value of the table. As you can see on the attached image if I get the values from the table the Object ID wuld be 1.3.6.1.4.1.5003.10.10.2.21 and I get the values

.0.0

.0.1

.0.2

.1.0

..etc

the other option is to go down on the tree an the Object ID will add .1 at the end and .1.3 depending on the value that I need.

The problem is that I try to add a monitor for the first value but it seems not to be working.... I already try with 1.3.6.1.4.1.5003.10.10.2.21.0.0 (to get th efirst value of the table)

1.3.6.1.4.1.5003.10.10.2.21.0.1.1.3.0.0 but the results are not the correct ones. Can someone explain how can I monitor one specific value for this table? and if I have to use the OID of the table because I'm not being able to make it work.

Thanks and regards