Help with Cloth modifier

Hi !
I’m new here, so first of all I’ll introduce myself. I am new to the world of 3d. Even if I’m not totaly noob with blender (I used it for almost a year now, and I read sereval tutorials), I’m still a beginer and I need help with the project that I am working on. Also, I apologize for my bad english, it’s my second languague.
I’m not sure if I’m in the right section, I don’t know if I should have post this question in the animation board instead, but nevermind, here is my problem.
I’ve modelled a sail ship and I’m using the cloth modifier to simulate the wind in the sails. Everything work fine, my animation is perfect for the hundred first frames, but after a couples of frames, it freezes. I’ve made some research, but I can’t find a way to make the wind mouvement to continue for more frames. Maybe someone with more experiance with the cloth modifier can help me to achieve the effect I want.