The receiver can be linked to the bike transmitter even when it isn't connected to the garage door opener, so odds are it isn't how you have it connected to the GDO. But you could disconnect it from the GDO, plug it in to the wall outlet, and then try just to be sure.
I'd suggest going back over the install of the transmitter to the bike and make absolutely certain you followed the instructions to the letter. Those instructions cover many different models and years, and it's easy to miss something important to your particular model. The HD-LAN models definitely require different methods than the older models. If you verify you've done it exactly per the instructions and it still won't link up properly, you may have a bad kit.
Jerry
Btw, I went back and reread your post and noticed you said the receiver LED flashes when you activate the bike transmitter. If that is the case, then obviously you already have the transmitter programmed to the receiver. What brand and model garage door opener are you connecting the receiver to?