Jaguar clutch problem

Went out this morning on my clutch pedal went right to
the floor and  did not return  I have checked the return
spring and it is okay  thinking I might have a fluid leak I
decided to bleed the clutch  I connected by a pressure
bleeder to the reservoir opened the  blinder  nipple and
cannot get any fluid to come through  I have checked all
the lines for leeks  and I cannot find any the  level and the
reservoir does not fall  can anyone help or point me in the
right direction thank you Audrey