Why does internet explorer and firefox keep acting like it is refreshing?

i am trying to play farmville on facebook okay? and it worked for a little while and stopped.... and it acted likeit was refreshing and it stopped then went to a blank white screen and keept going to the white screen and stopped doing the refreshing thing.... i made a new account and it worked for a bit then it started refreshing again and now im getting mad.... when it went to a white screen it would do it on 3 different computers but on all 3 other accounts worked.... im not sure whats going on.... but it keeps acting like its refreshing going from one link to another.... i kow its not a virus or anything so plz help asap i might go insane...