I have not long had a Samsung 40" LCD TV, lovely bit of kit, Its allshare capable and connected to the wifi network via the Modem/ Router beside it. SGS2 using the samsung remote app works perfectly.

laptop can see the TV on the network, when i first got it i enjoyed using the play to feature in W7 alot, now all of a sudden it wont work, i can pull video off the Laptop with the TV but alas no longer push it from the Laptop.

The error is "media file not supported" file is avi or mp3 and i know for a fact they have worked previously, can't think of anything i have changed lately on the Laptop, but its not impossible i have done something dumb.
Any idea's please