Have you tried it in C5 at your place?
You should still have it in the applications folder
as the Cubase upgrades do not overwrite the last version.
Just checked my iphone and my Bluetooth WAS on…however, I turned it off and it still won’t connect. Tried restarting everything too. 
There’s some complicated stuff I can try here…just trying to avoid it if I can:
Any other ideas???!
This bit could be relevant perhaps about the ip addresses of the computer running Cub & the iPhone:
"They had to be in the same adressrange.
For example: I-Phone 192.168.1.101 and PC 192.168.1.156. Both with networkmask 255.255.255.0
If the PC in this example has 192.168.2.156 the system will not work. If both have the same address it will not work too."
I certainly didn’t have to fiddle with any of the other stuff mentioned in that post to get it working. Using BT Home Hub, btw, if that’s of any help.
Haha got mine to work finally.
Cant take credit though. Just did a fresh Windows install…reinstalled everything, and it just works.