Access violation error with M-Audio Code 61

[Grumpy]

Hello, everyone!

I bought a Code 61 keyboard, and tried to set it up with the latest FL Studio. Everything works, except the bank select buttons. Whenever i press one of them, i get an error message (see screenshot) and every Mackie-related button stops working, while everything else remains working.
I could narrow the problem down to the point, that i think it has something to do with the input Port 3 (MIDIIN3), when it is set up as a Mackie controler. If i disable it, i can use the bank select buttons without the error, but of course loose the Mackie functions.

In general, i think i more or less covered all common troubleshooting steps:
-disabled send master sync, since i read that it is actually not needed and can cause problems
-tried both 32 and 64 bit FL
-tried different USB ports, 2.0 and 3.0
-tried different USB cables
-tried an external power supply
-tried a different PC
-freshly installed FL
-updated all drivers

Maybe someone has a solution for me!
Thanks in advance!

[Grumpy]

Sorry, forgot to add, that i am using Windows 7...

[NTO]

Hi! Using the same OS, but don't have that con...

[Grumpy]

Hey! First, thanks for the input! I monitored t...

[NTO]

Look into why you are getting two of everything...

[Grumpy]

The Code has several software out- and inputs a...

[NTO]

Based on the FL setup screen you posted MIDIIN1...

[NTO]

No driver on the Code I guess, but here's the e...

[Grumpy]

The Code does not need any drivers. I had two o...

[NTO]

"... two of the Codes outputs ..." Only Code ou...

[Grumpy]

HOLY SHI* I GOT IT! I had to set MIDIIN3 and MI...