My brake line won't bleed out on the right side, why? on 1994 Mercury Cougar

The brakes went out to almost nothing, so I bought new lines, and brake fliud, but the right side won't bleed out. What's wrong?

Asked by for the 1994 Mercury Cougar
You have no flow from the master cylinder. Start at the line connection at the master and see if fluid comes out and then move down the line to next connection. Could be collapsed hose or damaged line-kinked or smashed.
I already know this, I guess what I am asking is, if there was flow going through the line before it blew, why won't it flow thru now?
The answer stands. If you have no flow starting at the master then the master has failed and may be because you did not bleed correctly.