The first step in pairing up using an EWDMX is preparing the receiver. In this case, it will be the Platinum Spot 5R Pro. Access your light's menu, then go to Personality > Wireless DMX > Activate WDMX.
After activating WDMX on your light, reset the wireless DMX memory by going to Personality > Wireless DMX > Rest WDMX Mem
Now that your receiver (Platinum Spot 5R Pro) is ready for pairing, you can now press the function button on your transmitter. The LED should flash rapidly red/green on the transmitter. Eventually the LEDs on both the transmitter and receiver will synchronize. Once this happens, your units will be paired up.
On a side note, the LED on the transmitter should never be solid red. If your LED is solid red on your transmitter (EWDMXT), then it is either no good or the internal PCB has been switched with a receiver (EWDMXR).