5d mkii playback bug????? help please

[rmfilms]

[color=#444444][font=Tahoma, 'Trebuchet MS', Helvetica, Arial, sans-serif][size=3]Hi guys,[/size][/font][/color]

[color=#444444][font=Tahoma, 'Trebuchet MS', Helvetica, Arial, sans-serif][size=3]Just started getting issues with my 5d mkii, after recording a clip and going to play it back to check it the screen freeze audio playbacks then the camera stops responding and I have to take the battery and card out to get it to work again. (It stays frozen switching off with the button) [/size][/font][/color]

[color=#444444][font=Tahoma, 'Trebuchet MS', Helvetica, Arial, sans-serif][size=3]Footage is fine playing back on the computer. [/size][/font][/color]
[color=#444444][font=Tahoma, 'Trebuchet MS', Helvetica, Arial, sans-serif][size=3]Also the cards are sandisk 60mbs so plenty fast enough.[/size][/font][/color]

[color=#444444][font=Tahoma, 'Trebuchet MS', Helvetica, Arial, sans-serif][size=3]Anyone had this issue before? [/size][/font][/color]
[color=#444444][font=Tahoma, 'Trebuchet MS', Helvetica, Arial, sans-serif][size=3]Can't really send it off to canon as I need it for work.[/size][/font][/color]