I can't use Index Method with ADO (VB6)

I want to use indexed .mdb with ADO. But I can' use it because an error occurs (with the message : Method or data member not found
). Assume that I use "rst" for ADODB recordset, when I type "rst.", VB shows the intellishow pop-up menu for displaying methods/properties but Index method is not available.
When I try to compile the source (with .Index) an compile-error occurs with the message : "Method or data member not found
".
What should I do ?. Please help me.

H2A