Wow, you mean you want to force the engine to move while getting it played automatically through Yay???
Well, I'm sorry but you can't do that, you shouldn't interfere with the engine while it's connected to Yay, if you want your engine to play fast, you should set its time and parameters before starting to play, here is an example settings of parameters for playing fast:
http://uploaded.to/?id=8rba16 <----
dead linkif your engine still stops playing during the game, it means that you have a big problem, make sure that the engine you're using is not a clone one and your book is well-optimized, because sometimes, we might accidentally change the playing system of our books, which results in engine's either making random moves or stopping moving.
Ever tried, ever failed. Try again, fail again. Fail better.
Samuel Beckett