Shift+Tab for UnIndent not working in workbench editor

Hello everybody,

I'm trying to indent my code for getting a better overview. But the problem is that unindent with the shortcut SHIFT+TAB doesn't work in insert mode.

In a strange way after the workaround by pressing the Insert button to change to overtype mode, press once SHIFTTAB (the unindent works) and then pressing once again the Insert button, the unindent works for this particular line. In all other cases ****TAB has no effect at all, cursor stays where it has been.

The shortcut for Edit.UnTab in the options, Keyboard of the ABAP workbench is set to SHFIT+TAB. Furthermore in the keymap.xml (C:\Dokumente und Einstellungen\...\Anwendungsdaten\SAP\SAP GUI\ABAP Editor) file everything seems to be ok:

		<HOTKEY id="37003">
			<VerbID>Edit.Tab</VerbID>
			<Descr>Insert tab or indent selection</Descr>
			<Shortcut Shift="0" Ctrl="0" Alt="0" Key="9"/>
		</HOTKEY>
		<HOTKEY id="37004">
			<VerbID>Edit.UnTab</VerbID>
			<Descr>Untabify selection</Descr>
			<Shortcut Shift="1" Ctrl="0" Alt="0" Key="9"/></HOTKEY>

We are running SAG Gui 720, file version 7200.2.5.3211, build 1235132, patch level 5.

Could it be that it isn't possible at all, or is this working at anybody? Any ideas what to do?

Cheers,

Thomas