AP1252 tkip errors - HELP!

[tsrader]

Have 4 AP1252 installed.  Clients dropping off wireless every 20 min.

Multiple clients running HP  tablets are dropping often and unable to connect for a period of time.   Log files on WAP show TKIP MICHAEL MIC errors.  Have already configured  the  "countermeasure tkip hold-time 0" but that hasnt fixed issue  either.

WAPs running on power injectors (non-PoE)

4 WAPs within 100ft due to obstructions

     Power setting: 14

     Client power:  max

Can someone post a baseline 802.11n working config which can be used to get at least one WAP working?

Any help is appreciated.

Config attached:

[Nicolas Darchis]

Hi,

by the way, you will never achieve 11n speeds with WPA1-TKIP configured. 11n standards require the ssid to only run WPA2-AES. That was for the side note.

For the rest, those failures would most likely come from the client drivers rather than the access point. Which IOS version do you have ?

Nicolas.