vb6 Need Help (vbalListview Control)

I need help about vbalListview Control.

I am having a problem on creating group in listview.

My Codes :


Dim colX As cColumn
Dim lstX As cListItems
Dim grpX As cItemGroups
Dim itm As cListItem

With lv

.View = eViewDetails
.ItemGroups.Enabled = True
Set colX = .Columns.Add(, "Name", "Name")
colX.Width = 2600

Set grpX = .ItemGroups.Add("1", "GROUP1", "First Five Items")

End with

runtime error 91

What am I doing wrong?

Any help?