I keep getting black screen on RuneScape. How do I fix this?

[999]

So lately I've started playing RuneScape again since a very long time. But today, it stopped working for me. Whenever I go to the game, http://runescape.com/game, I just see a black screen. In Google Chrome AND in Internet Explorer. I do have the latest Java version. after a while in the top left it says "Error. Click for details." in red. When I click it, it says "Rs2Applet.class", then I click on Details and then it says this:

Java Plug-in 10.51.2.13
Using JRE version 1.7.0_51-b13 Java HotSpot™ Client VM
User home directory = C:\Users\Admin
----------------------------------------------------
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
----------------------------------------------------

Does anyone know what to do now? Thanks in advance!
And I have also tried downloading the game, but then when I start it, it says it won't configure and it might be because my Firewall doesn't allow Runescape through. But is allowing RS to come through.

[karl]

Press S at the loading screen before the login.

[Matthewâ„¢]

Go to the RS tech support forum.

http://services.runescape.com/m=forum/forums.ws?25,26