iPad 1 won't connect to Comcast Xfinity TG862G/CT Wireless Gateway

Hi all,

So I had my Comcast service set up a couple weekends ago (new employee, switching from FiOS).

The tech originally brought me a DOCSIS 2.0 eMTA and I attached my own separate Netgear WNR3500U Router, and connected without issue. Connected devices include:

(2) iPhone 4's

(2) MacBook Pro's

(1) New iPad

(1) iPad 1

(1) WinXP Desktop PC

(1) Blu-Ray Player

(1) XBox 360

(1) Nintendo 3DS

I've boldened the device that is about to have the issue.

Comcast has upgraded their High-Speed Internet (HSI) speeds in the Boston region now, so I was upgraded to an ARRIS TG862G/CT Wireless Gateway over the weekend.

Set up of the Gateway went very easy. Set up using WPA2-AES Security using a supplied 16-digit security key. All of the above devices connected at amazing speeds without any issue, until I got to the iPad 1.

When I select the Wireless Network, I get the swirling animation as if the iPad 1 is trying to connect to the network, but it just never connects. I've tried the following steps:

1. Complete factory reset of Wireless Gateway and restarted install & setup.
2. Complete factory reset of iPad 1, including upgrade to iOS 5.1.1(9B206).
3. Tried changing following settings on Wireless Gateway
   1. Tried reducing security to WAP2, WEP, down to OPEN WiFi.
   2. Tried changing WiFi channel from Automatic to Channel 1, 6 or 11.
   3. Tried changing name of WiFi network from factory installed, to custom.
   4. Tried manually adding iPad 1 to Connected Devices menu on TG862G/CT.
4. Connected iPad 1 to outside WiFi networks without issue. It works. Just not on this Gateway.

If I go back to the WiFi network I am trying to connect to, it even shows at times that it is picking up a valid IP address from the Gateway, but still no connection to the internet at all.

Overall I have tried everything I can think of to connect my iPad 1 and to this point, nothing has worked. I have contacted Apple to ensure working functionality of the device, which they confirmed my assumption: It's working 100%. I've also contacted Comcast to confirm working functionality of the Gateway, which is fine seeing as how I have no less than 5 other devices connecting to it without issue right now.

If anyone has any suggestions, outside of what I have already tried above, I would love for someone to help me solve this frustrating issue.