By not allowing you to save, do you mean whatever info you put in, it does not save? Please update your firmware to make sure it is the latest. Just download this file onto your computer:
http://www.bluespray.net/download/bluespray-ar.imgOnce updated, try again. Make sure you enter the information correctly.
If the controller still cannot get an IP address, check your router's log (if possible) to see if there is a problem with any system getting an IP address.
Make sure your controller's placement has good wireless signal. If it is weak, consider using another wireless router as a subnet. We recommend a subnet router instead of repeater because it is more reliable and cheaper.
Please post back what you find. We'll be here to help you.