I just got a 1st gen airport extreme on ebay and want to use it for airplay and wifi range extension and the like. However I cannot discover it on anything. I am aware it is incompatible with AirPort Utility 6.1, so I have connected it by ethernet cable to a my G5 PowerMac running OSX 10.5.8 and airport utility 5.6.1. It does not detect it at all. I also tried connecting it by wifi to my windows pc running Airport Utility 5.6.1 and it also does not detect it. I have tried connecting it by ethernet to my modem as well as my AirPort extreme 5th gen and have reset it twice to no result. It just blinks with a fast green light but every one of my devices ignores it. Even with my macbook pro running AirPort utility 6.1 it should detect it and tell me i need to downgrade but even that does not happen. I'm beginning to suspect this is just broken. I've tried various fixes and none of them work. Anybody know what I have to do?