Digital BW, The Print

I have always calibrated my screen to D65 (with basicocolor display + eye one pro) and also 
the prints profil with basicocolor print3c. I am having a problem that my printprofels are 
always a bit to dark and I called to Basicocolor for adwice. They told that I should use D50 on  
the screen and prints profils and that they would be lighter? Does anybady know what 
happens if I change all to the D50 Daylight. Will all my files now look a bit more yellow? I don
�t totaly understand this. When I stodyed photography we learnd that D65 was normal 
daylight. 

So before I start to change my profile workflow to D50, I like to ask if its a good idea and 
what changes I can expickt.

My main problem was that to profiles are a bit darker wich I just fix by a curve in Photoshop 
but when you make printing via Indesign you have a problem.

Thanks

Joakim