Had very good success this week with the MusicIO app, and using a cabled connection. Wifi has always been a world of pain with me and audio in Windows, the cabled route is much more appealing to me.
The one thing you need to know that is you need to have iTunes installed - I lost an hour pulling my hair out til I found that tip. Once installed, it worked right away. You need to create one dummy audio and one dummy midi track in your DAW - the audio hosts the VST plugin used to connect to the iPad, while the midi is used to feed the midi coming in from MusicIO into your chosen instrument. MDP2 picks up the virtual connection from MusicIO immediately (BTW I just have the simple midi version of that app as I don't need the audio part).
I've gotten far further than I ever did with Lemur and wifi.