Panasonic VT30A profile issues?

[meadx001]

Hello

I have a Panasonic P55VT30A which appears in mezzmo under the profile Panasonic models (2011).
It used to play mkv and mp4 files with ease.

Please note that my TV is connected with a cable to a netgear WN2000RPT router which appears as the connected device on my router connected to the computer

At the moment the following is happening,

If I play an mkv file then it plays it, but the aspect is full screen when it shouldn't be.
If I play it with transcoding off it plays with the wrong aspect
If I play it with transocding on it transcodes all files and struggles. It plays them in the correct aspect but it freezes after a few minutes of play and drops out.

I never had any of these issues previously.

What appeared to happen was when I coneexted an xbox 360 it seemed to replace the IP of the TV with the 360 profile.
I changed this back to Panasonic to get it to play anything but I can't seem to get a movie playing in the correct aspect without it transcoding.

I changed the profile to Panasonic 2012 and it plays in the correct aspect but has to have transcoding on?

It is driving me crazy - Please HELP

Alistair