Try this http://forum.tp-link.com/showthread.php?74783-TL-WA901ND-AP-Stops-Working-Needs-Rebooting&p=164013&viewfull=1#post164013

disable DFS channels

Is your AP model 7510 I read this in post #1 I activate the DHCP and the range is between 192.168.2.10 - 192.168.2.199. 1-if you enable dhcp on the AP wrong, disable dhcp 2-with dhcp enable you are...

Note: Im not an expert. 1-any AP no matter brand or model, is campatible with any router 2-you need LOS (line of sight) between AP and smartphone or Lap on your friends home 3-yes, but not ideal, 210...

blacktandog wrote Thanks so much for your info, currently checking and I'm shocked to read the one I quoted above You should never use plastic clamps to support your APs, always steel clamps

Edit I answered to @Saedawke, thinking he was the poster on #3 ok @blacktandog RF Armor is not and antenna, its a shield for the sector antenna, to avoid interferance, Shield that you will need with...