SNAPI works only after waking up from sleep??

Hi all,

I am developing a mobile application in c# where i need to schedule a service to run at specific instances of time. So i sleep the process till then. Also i need the service to respond to events even while it is sleeping. I tried using SNAPI but the notifications are sent to the service only after it wakes up from sleep. So please if anybody could help me make it respond to the notifications immediately it would be really helpful.

Thanks in advance