Hi, we have 2 ZoneFlex R600 dual band AP's (9U1-R600-XX00), we are not using DHCP on the access points, but the border router is doing DHCP. Most mac's, iphones and windows devices work fine. We have a handful (about 5 out of 70) machines that just cannot get an IP via the wireless network. Sometimes if I disconnect/reconnect and disable/enable their adapters it works, but other times nothing works. If they connect via wired they get IP no problem every time, if they connect to other wireless networks they work fine. If I try to do ipconfig /renew, i get an error. Any ideas?