Big files corrupted winsock send

I have a program that sends files between 2 computers. I'm using winsock to send the files using the send function. The program works great for small files. But when I try sending large files, they become corrupted. Can anyone tell me why is this happening and how to send large files over TCP without corrupting them?

Well, you probably should send them just like you send the small ones, in small chunks. It's probably impossible to tell what the problem might be without seeing some code.