the network connection was reset

I have been having problems with itunes. I get the message "the network connection was reset" I try click on the itunes little house icon several times, still get the error message. So, after a few days of having problems and searching this forum, I decided to trouble shoot it. On my macbook pro, I open itunes, no problem. Then, I plug in my iphone 4 and open itunes- get the error message. unplug my iphone and open itunes-no problem. Plug my iphone 4 back in and open itunes and get the error message.

So at least for me, the problem presents it's self when my iphone 4 is connected.