ivms 4200 vs install, no live view on android, recordings ok

have been using 4200 pcnvr for ages but wanted to update to somthing newer

have installed on my W10 server the lastest version of storage recorder and streamer

client installed on main pc and works fine for live view and config etc

but i cannot get the Android app to live view, was fine before on pcnvr software

can access recordings ok

any ideas?