I was doing some tests on the Soyuz 7K, launching it with Thorton's Soyuz rocket, but I can't launch it, because either the launch is aborted, or the engine gets on fire and the rocket explodes. This happens every single time, and it's really annoying. I've tryed the Soyuz 2 with Fregat, and it works, only the launches with Soyuz FG w/Soyuz 7K fail. I don't think the problem is with 7K being payload 'cause until yesterday it worked 100% OK. Any idea what the problem is?