Problem configuring MIDI controller

Hi
I need some help hope somebody can help.

I have just built a DIY Midi foot controller but i am very new at Midi.
I can program it to change rigs no problem.
I have 4 switches which can be any combination of PC or CC (up to 4 seperate)
I want to have switch 1 in each bank (bank will be song) turn the tuner on.
I have programmed switch 1 to send CC #31 with a value of 127 - for on.
It seems to work the first time but it will not change back when i choose a rig by pressing switch 2.
I have to switch the kemper to tuner mode and then browse mode and then its ok again.
is there something more i need to do, apart from CC 31 with a value of 127?

regards
Taz

Ok, so I figured it out.
Seems I have to send CC31 with a value of 127 to turn on the tuner and then CC31 with zero to turn off
the tuner before I can send a PC to change patch.

The other problem was that while initially testing my footcontroller it was sending out wierd and random
midi messages so once I had fixed that problem a simple on/off /on of the Kemper got it responding correctly.

/Taz