As I continue to fail to record using VAC, I thought it was just my luck that I couldn't book a Skypecast for Monday. Using the skypecast booking system and having chosen the date I got the message that it was not possible to book a session more than two weeks in advance. I found this baffling but having notified Skype support they have replied that this is a problem they are aware of and which they are working to rectify. Just in case anybody else out there is experiencing the same frustration.