Machine with Fanuc 6M control not feeding

I have a VMC, Amura Seiki (1989) with Fanuc 6M control, everything works fine but when I try to run a program the tool moves to the starting machining point with no problem, but when it reach a G code with speed control block as G01: stops at that point. It just stop and shows no alarm or error
It responds to G00 for example.

Is it a problem of parameters?

I do not have any manuals, it is very old.
will apreciate your advise