[TYPO3-caretaker] Problem connecting server and client

[Behrang Alavi]

Hi
I have made a test installation of the two extensions caretaker and
caretaker_instance.

as far as i see i have made everything written in the manual.

but all i get for my 2 sites is:


Title: samavayo.com
Path: Caretaker Root -> mydomain.com
NodeID: instance_1
Description:
Hidden: no
last Run: 01/01/70 01:00:00
State: Undefiniert
Message:

and on loading the overview page:

Title: Caretaker Root
Path: Caretaker Root
NodeID: root
Description:
Hidden: no
last Run: 01/16/12 13:42:24
State: Undefiniert
Message:
0 von 1 Unterelementen haben die Tests bestanden (0 Fehler 0 Warnungen)
- Undefinierter Status in Unterelement mydomain.com

The only point of the config i dont understand is the

"Public key of the caretaker server[crypto.client.publicKey]" on the
instance side.
how can i get the key for this field and is obligatory?
thank you