get_iplayer says No specified modes available
 

I had get_iplayer working well but now (after an upgrade) I get:

INFO: 1 Matching Programmes
INFO: Checking existence of default version
INFO: No specified modes (iphone,flashhigh,flashstd,flashnormal) available for this programme with version 'default' (try modes: )
INFO: Checking existence of audiodescribed version
INFO: No specified modes (iphone,flashhigh,flashstd,flashnormal) available for this programme with version 'audiodescribed' (try modes: )

Any suggestions for how to fix this?

OK found an answer, thanks to the author of the program who kindly sent a solution. I'm using a proxy server and I had to tell get_iplayer to use the proxy. It now works fine.