Logic Pro Cannot edit midi on track anymore

[dwfresh]

Hi, i need help. I have a song where the midi track somehow looks different than all the others, and now when I click the track ( or region ), the piano roll editior does not show up and I cant edit this track anymore. please help .

i cant insert image of my screen shot which is unfortunate. but behind the midi notes on the track are these vertical dark lines, i don't know where they came from.

 

[Doug Zangar]

Unfortunate you can't provide an image, that would be helpful. The dark columns are CC information, could be mod wheel or aftertouch from your keyboard.