Midi Command blocks BB buttons?


I am trying to control my BB with Midi commands and I have been founding strangers events.

For example in the beginning I can use all options (volume, change folder, …). But, If I send a midi volume command (CC-108) I cant change the volume any more by hand. If I send a cc to change the folder/song, then I cant change the folder with the BB buttons… Is there something wrong with my midi controller?