How to Register SPA8800 with SPA9000?

[CSCO11605023]

The title sums it up. What I have done so far is this:

Cisco SPA9000

Static IP: 192.168.1.200

Subnet Mask: 255.255.255.0

Gateway: 192.168.1.1

DNS Server: 192.168.1.1

Proxy: 192.168.1.201

SIP Port: 5060

User ID: SPA9000

Display Name: SPA9000

Password: 12345

Auth ID: SPA9000

Use Auth ID: Yes

Cisco SPA8800

Static IP: 192.168.1.201

Subnet Mask: 255.255.255.0

Gateway: 192.168.1.1

DNS Server: 192.168.1.1

Proxy: 192.168.1.200

SIP Port: 5060

User ID: SPA9000

Display Name: SPA8800

Password: 12345

Auth ID: SPA9000

Use Auth ID: Yes

But it keeps showing registration failed, any suggestions how to make it register?

[nseto]

Units registering to spa9000, needs to know what the 'proxy listen port' and 'phone ext password' on the spa9000 is set to.

By default the 'proxy listen port' is 6060 and 'phone ext password' is blank.

These parameters are in the SIP tab of the spa9000.

So by default, I would be putting in the "192.168.1.200:6060" for the proxy parameter of the spa8800.  And no password if the 'phone ext password' is blank.  The userID should be the ext number that you want the spa8800 to be.