Thanks for your answers.
My drivers are up to date and i have the last directx.
I have an i7 with 12 Gb ram and a Geforce GTX 650 TI.
This tearing is only here when i don't maximize the window.
My screen has a resolution of 1920x1080 px and the game, when not maximized, is in 1366x768 px with TMX maps of (1024 * 5) width for a height of 576.
I dont know why i have this problem.
My graphist has a bigger machine than me, and also get this when not scaled.
I've helped him to update the driver of his graphic card and install DirectX, but no changes.
I don't know why i get this tearing.
If someone test my capx and find something strange, please tell me.