delayed midinotes reproduction

I have delayed midinotes reproduction.
I am using Cubase 7.0.6 thru an M-AUDIO (MIDISPORT 4X4 Aniversary) on a Mac Pro/OSX 10.8.5 with a YAMAHA SY99 as a mother Midi Keyboard.
I updated the driver of the M-AUDIO and Midi thru is ON.

When I use a Midi USB Keyboard (AKAI MPKmini) i don’t experience any delay.
Only with my SY99.
Any ideas ?

Thanx in advance for any help.