Unable to select the appropriate option from combo box

[gigabyte]

Tried following code
#Include <GuiComboBox.au3>
#include <Constants.au3>
local $hcombo = "[NAME:ctlMsgQueueCombo]"
;Start test executable
Run("Z:\test\Groups\bin\Debug\Test.exe")
Global $hWHandle = WinWaitActive("Test Form", "", 2)
sleep(8000)
controlFocus("", "", "[NAME:ctlQueSelector]")
controlsend("", "", "[NAME:ctlQueSelector]", '2')
ControlCommand("Test Form", "", $hcombo, "ShowDropDown")
ControlCommand("Test Form", "", $hcombo, "SelectString", 'TPA Processor (TPA QWERTYGP Compound) - Qwert00')

but it always selects the first TPA found in the dropdown options instead of matching the exact string

[Valik]

Non-standard control (.NET I think). No bug.