Strange Behaviour Send Faders

Anyone know this one:



Protools working fine...but only when i want to change the send faders the faders seems to very slow...working with mouse.... very annoying especially when I want to write automation with mouse...there is no additional fader hardware...



This strange behaviour is only with the send faders not the channel faders those works fine, even dthe aux faders,master faders....



Setup:



Macbook Pro Retina 10.9.3

Magma 3T with 1HDX card

Protools 11.1.3 HD

Omni i/o

HD i/o

Thunderbolt display



Any one any idea?