How should I plug my headphone amplifier ?

I just bought a Musical Fidelity X-Can V3. When I tried using the tape out of my Ayre K-5Xe preamplifier to the line in of my headphone amp, I get a very distorted sound with a lot of noise coming from the headphone amplifier.

I tried the headphone amp directly connected to my CD player and it worked fine. I do have to find a solution because this set-up does not work for me as I have more than one source.

Please help me on this one

If you need to know here is the rest of my gear:
Audio Refinement Tuner
Ayre CX7e CD player
Ayre K5Xe preamp
Ayre V5Xe amplifier
JM Lab Utopia Diva BE

Thank you,

Utopia