Standard troubleshooting. Connect x700 directly to projector with HDMI cable and see if you get 3D.
If you don't get 3D, there is disc/settings/firmware/cable issue.
If you do get 3D, then the problem is one of the devices that you removed from the chain. One by one add a device to the chain (receiver, splitter, wireless adapter). When 3D stops working, you'll know which component has the problem. Depending on which component it is, it may have an incorrect settings, it might need a firmware update, or it may simply be incompatible.
One of the unfortunate aspects of HDMI+HDCP is that, even if every device is individually compatible and configured correctly, the sheer number of devices and even physical distances can cause various problems.