java help

Runescape Hd, Please Help

Java Console Says this when I click HD

java.lang.RuntimeException:
at ih.(ih.java:2612)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at dr.a(dr.java:640)
at nr.a(nr.java:31)
at no.a(no.java:549)
at vq.e(vq.java:115)
at rg.a(rg.java:5928)
at rg.a(rg.java:6974)
at rg.a(rg.java:6977)
at client.i(client.java:641)
at client.d(client.java:843)
at gk.c(gk.java:274)
at gk.run(gk.java:805)
at java.lang.Thread.run(Unknown Source)

Newest Java, Newest Graphics Drivers… Geforce 7600 GS and 3 GB Ram. Any Ideas?