Presonus - Central Station Owners, Problem with Toslink Options

[Mac-Dee]

Hey Gurus i have a Presonus CS and i am running out of my G5 (digtal audio optical out) into my the CS Tos
If i shut the computer down my gear and come to boot it up in the morning i will switch my CS to Tos Digital which i have connected yet No signal i have the sound setup to digital out ... eventually the signal kicks in after 15 mins i do a disk scan or something and its ok if i do a reboot but when i shut down and come back to it after being shut down for a while same problem

I have a RME -hdsp9632 Pci and i run it through that works fine on start up all through but the Tos is F**Ked been Rackin my brains on what to do any ideas ?

Thanks Advance