TC70 disable Android Back Button

Hello,

is it possible to disable the Android Back Button under the display on TC70?

I'm using TC70 with Android 4.4.2 and EB Webkit 1.3.17.0

 

I have found this blog post:

Android Back Button and Enterprise Browser

 

but when I add the line to my config.xml:

<MetaTag value="KeyCapture~KeyValue:0xA6;Dispatch:False”/>

 

EB doesn't start any more. Direct after starten the EB I get a popup with "Enterprise browser has stopped".