Cannot login to WPMU DEV Dashboard : cURL error 7

I cannot login to WPMU DEV Dashboard and cannot use any of the services. I receive the following error message:

"Your server had a problem connecting to WPMU DEV: 'cURL error 7: '. Please try again.
If this problem continues, please contact your host with this error message and ask:
'Is php on my server properly configured to be able to contact with a POST HTTP request via fsockopen or CURL?'"

Please advice.