WPMU desktop plugin not working

Hello,

I cannot submit a support question via my plugin. I keep getting the following message: "There was a problem posting your support question: There has been a temporary error contacting the remote server."

I have re-applied the API key. I have deleted and re-installed the plugin and then re-applied the API key and when that didn't work, I requested a new API key. Nothing seems to work. The live support person suggested it was my connection. I am able to get to the internet (clearly), so is there some other connection that may not be working?