Hi,
What Values does your Pedal send? As far as I know, there was a change in Cubase in Past. Some Sustain Pedals (for example on some Yamaha Digital Pianos) can use continuos data. Or for example 4 ranges of Sustain level. This is for more realistic Sustain Pedal emulation.
So it’s the question of the HW Sustain Pedal, what data does it send. Btw, film you need to, you can change it via the Input Transformer in Cubase.