Remote machine Unavailable

Mobile Phone == HTC desire, Android2.2
Pc Windows 7 Ultimate
PocketClould Companion 2.03

Hi,
I purchased your app last night from the Android market, Installed the companion software on my PC, ran auto discovery on my phone, and connected to my PC first time.

Problem:

I re tried this morning, the computer was powered up, but asleep. I could not connect. No problem I "woke" the Pc, and retried. I still get this error message

"Remote Machine Unavailable

The remote machine you aretrying to connect to is offline and unavailable"

Ok Now I now I cant connect whilst my machine is asleep, but How do I connect when its awake, and rid myself of this error message

Many thanks

Sean