trackball issue

[shitoken]

Hi friends
My panel setup with I/O ultimate board from ultimarc with his spinner and rgb buttons. I did not bought trackball  because my control panel already have china made usb ball tracker which I plug into the mother board directly.

Now here is the problem: - 

I have 1 real mouse with keyboard , 1 Spinner which plugged to I/O encoder (This both works fine)

But the trackball will not function until I remove the spinner from the ultimarc I/O board.
Is there a limit of max 2 mouse per motherboard?
I doubt should not be otherwise how other members can use spinners, mouse, trackball all at same time?

Because my control panel was cut to the size of this trackball,  I cannot replace the one from ultimarc.
Do you have idea what is going wrong my setup?

Thank you so much