Could you let us know the exact versions of uRemote and uTrack24 that you are using.
You can check the firmware version of uTrack24 from Settings Menu->Utilities->System Details
Could you also give the IP address of the uTrack24.
For the uRemote, you can click on the uRemote icon inside the app which should open an about box. In this are the details about the version and which device (IP address) is hosting the app.
Apart from this, you have to make sure that the IP address provided for the Wifi and the wired connections are in the same range.