Should be off on the head I believe, otherwise the footswitch wont work, which you found out. Check your send/return volume. When all else fails, look at the manual...
If the FX Loop Button on the foot controller is off, the preamp signal flows from the Vol. 1, 2 & 3 controls
into the power amp section. Naturally, you will want to get a balance between the three channels. Do this
now with the Vol. 1, 2 & 3 controls (the channel masters).
If you want to put an effect in the loop, plug a shielded cable from the Send jack on the rear panel to the
input of your effect, and another shielded cable from the out of the effect to the Return jack. If the effect
has "level" switches, set them to "+4". Tap the Loop button on the foot controller. You will notice that the
yellow "FX loop indicator" light under the "presence B" knob on the front left panel will come on. You have
a knob on the left rear panel with the words "Master Vol." under it. Slowly bring up the "Master Vol" Knob.
You should now hear your effect. In series mode use the balance control in your effect to balance dry
signal with effected signal. The Master Vol. now is the Power Amp (return) Volume, and it only works if
the loop is on. The Master Vol. knob allows you to match Loop on and Loop off volumes. Switch Loop off,
listen to the volume, then switch Loop on and match that volume with Master Vol. Of course, watch the
input level on your effect. If the input LED’s are in the red, turn down the input of the effect, and reset
Master Vol. The Loop button on the Rear panel is there to switch the loop in and out if you're for some
reason without your foot controller. If there is no effect in the Loop, Foot controller or not, the Loop button
on the Rear panel must be set to "off", or the circuit from pre to power amp is open.
If you switch your Ecstasy to the parallel loop mode (located between send and return jacks), the signal
flow is a little different. The dry preamp signal will always flow directly to the power amp. The effected
signal will be added to or "blended" in with the dry signal. The knob on the left rear panel is called the
"Mix" control. The further clockwise you turn the "Mix" control, the more effect you'll hear. Now your guitar
signal has come back from your effect, through the Loop return and Master Vol. control, (or