Big difference between two files and a same flag simulation object after appending

I actually work on a ship animation with a cloth and wind simulation of the rear flag. Because of the complexity of the main file. I’ve worked on the simulation flag in an other file. The wind and cloth effect work perfectly in the second file but when I append the flag in the main file and I put the simulation in cache, the result is completely different and the animation is really worth. Moreover the cache processing is very longer. Is anybody knows why ?!?
Here’s the link of my project (the flag is not integrated yet) :
http://www.blenderartists.org/forum/showthread.php?348724-Ocean-simulation-and-sailboat-the-return-!