Sorted it out, i re-ran audyssey again, set the height speakers as front heights and it still didn't work (modemovie was already DSU). I then tried mode music and selected DSU and the height speakers became active.
Dont know why it worked, just happy it did.
Theater:JVC RS440, Elite 120". 7.1.4:RTi8, CSi5, FXiA4, RTiA3, 620-RT(4) & SVS PB12-NSD. Denon X4300H, UPA-700, Crown XLS1502 & XLS1000(2). Sony UBP-X800, Panasonic DP-UB424, Shield & ATV 4K. Lounge:Vizio M70-D3, Benq HT1075, & Elite 106". 7.1.4:RTi12, CSi5, RTiA1, TSx110, MC60(4), & RBH I-12. Marantz AV7702, Crown XLS1500, XLS1000(2) & Amp 100v2(2). Samsung UBD-K8500, LG BP440, Shield & ATV