help. i can't install limewire pro

i'm having a hard time installing limewire. it won't start up because of this:
LimeWire version 5.1.2 Pro
Java version 1.6.0_13 from Sun Microsystems Inc.
Windows Vista v. 6.0 on x86
Free/total memory: 59882864/66650112
FATAL ERROR!
com.google.inject.CreationException: Guice configuration errors:
1) Error injecting constructor, java.lang.NullPointerException
at com.limegroup.gnutella.BandwidthManagerImpl.<init> (BandwidthManagerImpl.java:22)
1 error[s]
at com.google.inject.internal.Errors.throwCreationExc eptionIfErrorsExist(Errors.java:281)
at com.google.inject.InjectorBuilder.fulfillInjection Requests(InjectorBuilder.java:181)
at com.google.inject.InjectorBuilder.build(InjectorBu ilder.java:109)
at com.google.inject.Guice.createInjector(Guice.java: 131)
at com.google.inject.Guice.createInjector(Guice.java: 92)
at com.google.inject.Guice.createInjector(Guice.java: 80)
at org.limewire.ui.swing.Initializer.createLimeWire(I nitializer.java:358)
at org.limewire.ui.swing.Initializer.initialize(Initi alizer.java:116)
at org.limewire.ui.swing.GuiLoader.load(GuiLoader.jav a:81)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknow n Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Un known Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.limewire.ui.swing.Main.main(Main.java:43)
Caused by: java.lang.NullPointerException
at org.limewire.nio.NIODispatcher.wakeup(NIODispatche r.java:590)
at org.limewire.nio.NIODispatcher.executeLaterAlways( NIODispatcher.java:389)
at org.limewire.nio.NIODispatcher.addThrottle(NIODisp atcher.java:211)
at org.limewire.nio.NBThrottle.<init>(NBThrottle.java :188)
at org.limewire.nio.NBThrottle.<init>(NBThrottle.java :149)
at com.limegroup.gnutella.BandwidthManagerImpl.<init> (BandwidthManagerImpl.java:25)
at com.limegroup.gnutella.BandwidthManagerImpl$$FastC lassByGuice$$4e943ad7.newInstance(<generated>)
at com.google.inject.internal.cglib.reflect.FastConst ructor.newInstance(FastConstructor.java:40)
at com.google.inject.DefaultConstructionProxyFactory* ****newInstance(DefaultConstructionProxyFactory.ja va:72)
at com.google.inject.ConstructorInjector.construct(Co nstructorInjector.java:91)
at com.google.inject.InjectorImpl$LateBoundConstructo r.get(InjectorImpl.java:482)
at com.google.inject.ProviderToInternalFactoryAdapter *****call(ProviderToInternalFactoryAdapter.java:43 )
at com.google.inject.InjectorImpl.callInContext(Injec torImpl.java:998)
at com.google.inject.ProviderToInternalFactoryAdapter .get(ProviderToInternalFactoryAdapter.java:40)
at com.google.inject.Scopes$1*****get(Scopes.java:49)
at com.google.inject.InternalFactoryToProviderAdapter .get(InternalFactoryToProviderAdapter.java:47)
at com.google.inject.InjectorBuilder*****call(Injecto rBuilder.java:197)
at com.google.inject.InjectorBuilder*****call(Injecto rBuilder.java:192)
at com.google.inject.InjectorImpl.callInContext(Injec torImpl.java:990)
at com.google.inject.InjectorBuilder.loadEagerSinglet ons(InjectorBuilder.java:191)
at com.google.inject.InjectorBuilder.fulfillInjection Requests(InjectorBuilder.java:179)
... 12 more

-- listing session information --
Current thread: main
Active Threads: 8
Peak Number of Thread: 16
System Load Avg: -1.0
Objects Pending GC: 0
Free Space In Settings: 135305269248
Free Space In Incomplete: 0
Free Space In Downloads: 0
Heap Memory Usage: init = 67108864(65536K) used = 6767248(6608K) committed = 66650112(65088K) max = 266403840(260160K)
Non-Heap Memory Usage: init = 33718272(32928K) used = 28084992(27426K) committed = 37158912(36288K) max = 121634816(118784K)
-- listing threads --
Timer-0: 1
AWT-Shutdown: 1
[email protected] nPoolByRoute@44006e: 1
[email protected] nPoolByRoute@18952cc: 1
AWT-EventQueue-0: 1
FinalizableReferenceQueue: 1
AWT-Windows: 1
main: 1

-- listing properties --
LAST_EXPIRE_TIME=1238289252517
CLIENT_ID=468A65FDAB6F0BB60719BEEBB6045F00

Try these steps: http://www.gnutellaforums.com/333278-post2.html

If not work, then get your LW version from here: http://www.gnutellaforums.com/340213-post427.html, recommended LW 4.18.8