[geezacalledjim]

I have had an ATV2 with XBMC installed for a good few months now. Last week all of the 720p MKV files now continuosly buffer. They used to plat absolutely fine. It is extremely frustrating as i only bought the ATV to use this amazing feature. Can anyone at all help me with this issue.... I am new to this forum and any help would be greatly recieved.
Signal strength good!
Nothing changed since first install except larger library.
I am running windows 7 on my home PC and xbmc on atv2 with wifi connection

Many thanks
Jim