This is really strange but when i go onto a server, it works for a few hours then i disconnect. After that, i try to reconnect and i get the "connecting..." screen for a while in which soon i get the "disconnected from server, probably down" red screen. The main problem is that others are connecting to the server. One of my favorite servers, working skydive, i can't connect to anymore because of this.

One interesting note is that i changed my ip to log onto working skydive and it worked, and then stopped working eventually. Now both ip's that i have don't work.

Extra info:
current World of Minecraft.client 1.8.8
current java update
windows 7
minecraft bots can't connect to the server either
to change ip adress i used anchor free hotspot sheild