"CUDA update server unavailable"

Within the CUDA pane of System Preferences, “CUDA update server unavailable” is displayed (screen shot attached). This has been the same for several days now. Is this temporary? Is it something wrong with both my Macs?

Operating System is Mac OS 10.6.6, Snow Leopard. The pane usually displays the status of my installed NVIDIA drivers, if any updates are available, and an option to install available updates.

Thanks in advance for any help.

John

cudapane.jpg

cudapane.jpg

Exactly the same problem on Lion 10.7.1.

It says that there is a new update available but when I try to click “Install Cuda Update” it shows : “CUDA update server unavailable”