Distribution channel charachteristic

Dear Experts,

I have an issue I 'm using the standard distribution channel in COPA from fixed values but the values in reports are not correct some of dist.channels don't have values in spite of I checked their values in the SD standard reports so Can I use the distribution channel from another table like VBAK because I think the problem because it takes the data from MVKE.

So could you please help me because it is urgent.

thanks

Nassar