Problem with the window of the Tata Safari co -collection.

I have a problem with my car, it is a 2004 tata safari and it turns out that the co -pilot window does not go down. We have disassembled the cartonera but we do not know if it is the engine, of the guides or that, if someone has had the same problem, or if you know how to fix it ... I would appreciate it very much to contact me. All the best!