Isn't it just amazing that the manufacturers who want to bring out new improved performance for their products introduce technology that's limited to six feet of cable? This happened with both S Video and HDMI.
This is especially stupid for use with projectors, where six feet of cable is ridiculously short. They want to sell us great equipment but don't supply a signal that will go far enough for a good installation!
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw