OPC client vs RSLInx OPC server|OPC UA Implementation: Stacks, Tools, and Samples|Forum|OPC Foundation

I am using the RSIOPCAuto.dll from Rockwell. I connect to the RSLinx OPC server to access to tags within Rockwell PLCs.
I am using RsiOPCAuto.OPCBrowser mybrowser to moveUp and down through the nodes. Everything is working well a part from some types of tags.
In particular tag of structures are giving some trouble. So if I have an array of INT,DINT, REAL, other…,  algorithm is working.
If the array is an array of a structure mybrowser.Item(i) returns only the index of the array example
[0] instead of array[0] and within it I cannot find all fields of the structure but only some of them.

I am not sure this is the rightplace wgere to post.

Regards