Wifi sync in iPhone linked to wrong computer

On the computer you Want to sync to, open iTunes, then go to Store, from the menu bar, then View My Account, then in iTunes in the Cloud click on Manage Devices on the right. There you can deauthorize your former work computer and any others, plus authorize computers you want to use.

After that, try connecting your phone to the computer you want with a cable for an initial sync, then try doing the WiFi Sync after that.

 

Since upgrading to IOS6 my two iphones and Ipad has not been able to do wifi sync. They all worked perfectly previously. I was hoping the IOS upgrade from yesterday may have fixed the issue but still seeing same thing.

I have seen many other threads on here with the same issue so not too worried but essentially what happens is the device show available in itunes and as soon as you select WIFI sync it disappears with message that says cannot connect to device.