montoron- why such low volume output into Logic?

[mr rock]

Hi All,
I have been trying to record my Monotron via my new Focusrite PRO24 DSP interface into Logic and am confused as to why there is so little volume coming out of the Monotron.
I am connecting the Monotron to the Saffire via a 3.5mm Stereo Jack Male to 6.35mm Male cables and get such a faint level I need to turn the PRO24 DSP input level to 10 and use a 'Gain' plug-in within Logic to increase the volume further!
This is not ideal as any subtleties in the sound are overwhelmed by the amount of background hiss/ noise that is picked up from the Monotron.
That would be great if anyone could share their experiences/ work-arounds.
Kind Regards,
Mr Rock