bbc iplayer?

Your internet connection is not fast anough.

Your solution is to start the movie and put it in pause mode untill it's fully loaded.
Go take a lunch and go to the toilet while it loads...
Once it's done, it will play without interuption.

The other solution is to upgrade your internet connection to a higher speed that will cost you more each month.

Electro
October 2011

Your Line Rate (Broadband? - you don't say how you are connected) is too slow.

T
October 2011