ListViewItem with progress bar not refreshing correctly

I have a listview that uses a progress bar (pb1.png). There is a timer that refreshes the list (lvDisk) every 1 minute. After several minutes the list will not show the progress bars (pb2.png, but will show the .text

Me.lvDisk.Items.Clear()
For Each dRow In tmpDistinct
Dim itm As New ListViewItem
itm.Text = dRow

Dim pb As New Wisej.Web.ProgressBar
With pb
.Maximum = tmpUNCData.First.DriveSpace
.Value = tmpUNCData.First.UsedSpace
.Dock = DockStyle.Fill
.Text = drow.name

If percentUsed > 95 Then
.BarColor = Drawing.Color.Yellow
Else
.BarColor = Drawing.Color.Green
End If

End With

itm.Control() = pb
next

Me.lvDisk.Items.Add(itm)

The first image is what draws initially, the second is what shows after a while (again, sometimes it is several minutes, sometimes longer)

If I take out the line itm.Text = dRow, then it appears to always refresh with the progress bar