QTP vb treeview object recognition error

[skozer]

Dear all,

I want to double-click "PCA" in vb treeview windows. ("PCA" can be seen after expanding "EXE"—"Tags")

Code:

Code(Generate by "record" ):
VbWindow("frmMain").ActiveX("ActiveSizer Control").ActiveX("SSTab").VbTreeView("TreeView1").Activate "Electronic Catalog;Projects;EXE"
VbWindow("frmMain").ActiveX("ActiveSizer Control").ActiveX("SSTab").VbTreeView("TreeView1").Activate "Electronic Catalog;Projects;EXE;Tags"
VbWindow("frmMain").ActiveX("ActiveSizer Control").ActiveX("SSTab").VbTreeView("TreeView1").Activate "Electronic Catalog;Projects;EXE;Tags;PCA"

The first two steps work well, but the last step fails.
Related charts are shown below.

Please help me out, thanks!