Trouble with VDR client on Android

I have an OpenELEC server set up, which is working fine, running a VDR back end.
On a Windows machine, I can configure a VDR VNSI client and everything works great.
However, on Android, if I go through exactly the same process of configuring the VDR client, nothing happens. I don’t get the TV and Radio options appear in the main menu.
Does anyone have any tips for what I can look at? The log (accessible from the Kodi main interface) doesn’t show any errors.