Problem with TabControl and SkinFramework

I like to give my VB6 application the blue Windows XP Luna look by using the SkinFramework Control.
That's why I set the color property of my tabcontrol to xtpTabColorWinXP.
With this setting the active tab of a TabControl has NOT the same backcolor like the form has and on top there's a yellow/orange line. That's fine, it's the look of Windows XP.
But if I place a frame on this tab, it has the wrong backcolor. It takes the color of the form and not the brighter color of the tab. Please take a look at the screenshot.

What am I doing wrong? Do I expect too much from SkinFramework? Is there a solution?
EnableThemeDialogTexture doesn't seem to help here.

Sample app:
Place the following controls on a form: TabControl, SkinFrameWork, 2 Frames
Copy the file 'WinXP.Luna.cjstyles' from the CodeJock sample folder to the application folder.
Code:

  TabControl1.InsertItem 0, "Item 0", Frame1.hWnd, 0
  TabControl1.InsertItem 1, "Item 1", Frame2.hWnd, 0

  SkinFramework1.ApplyWindow Me.hWnd
  SkinFramework1.ApplyOptions = SkinFramework1.ApplyOptions Or xtpSkinApplyMetrics
  SkinFramework1.LoadSkin App.Path & "\WinXP.Luna.cjstyles", "Normalblue.ini"
End Sub

Screenshot:

Visual Basic 6.0 SP6
SkinFramework 10.3.1
TabControl 10.3.1

Any help with this would be great.