HD was working few days ago but someone messed with it and now, HD doesn't work. Here's the error:

Code:
java.lang.RuntimeException:
        at Class130_Sub2.<init>(Class130_Sub2.java:2125)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)

        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Sou
rce)
        at java.lang.reflect.Constructor.newInstance(Unknown Source)
        at Class44.method538(Class44.java:638)
        at Toolkit.method1157(Toolkit.java:50)
        at Login.method1154(Login.java:677)
        at Class131_Sub2_Sub38.method1644(Class131_Sub2_Sub38.java:113)
        at ScriptsExecutor.executeScript(ScriptsExecutor.java:5106)
        at ScriptsExecutor.parseScript(ScriptsExecutor.java:5929)
        at ScriptsExecutor.parseScript(ScriptsExecutor.java:5936)
        at client.method59(client.java:499)
        at client.method43(client.java:642)
        at Applet_Sub1.method41(Applet_Sub1.java:325)
        at Applet_Sub1.run(Applet_Sub1.java:842)
        at java.lang.Thread.run(Unknown Source)
Anyone knows how to fix since i'm noob client-sided?