Cannot Connect to Multiplayer Servers

Whenever I attempt to log in to a multiplayer server, Minecraft returns a Java error stating, "Failed to login: java.io.FileNotFoundException:
http://session.minecraft.net/game/joinserver.jsp?user=spam105&sessionI
d=379529477617257896&serverId=4164c7bb41a93c4f988fc9d081d268769
e5effd2", and happens for any server. I have uninstalled and reinstalled both Java and Minecraft, but nothing seems to work.