Instrument track in-active, without making it in-active

[Ylle]

Hi guys...

I have a problem with my PT.
Yesterday when I was making some sounds etc. in an instrument track it all of a sudden went blue, like when you make it in-active, which means I can't hear any MIDI played on that instrument track. The wierd thing is that it had been working, and then suddenly it just went blue, together with the rest of my instrument tracks - except one that is still working. I've tried everything, making all the other instrument tracks excactly like the one that is working, making it in-active, and then active again, and so on - nothing works. And it's not just in that session. If I make a brand new session, create an instrument track, that track is blue/in-active as well. But I can even import the instrument track that was working in the other session, into my new session, and then it still works.
Have no idea how this happened, it just went blue while is was mixing.

Anyone know what the problem might be ?


- Ylle