I got an error during runtime. I really need your help guys.. I don't know how to fix this, i don't have the knowledge about ASP or ASP.NET. I just want to install this, Because i'm planning to build my own online community. Below are the error i got during runtime. i just browse at the IIS. Thanks.. :)

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Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[NullReferenceException: Object reference not set to an instance of an object.]
   DotNetNuke.Common.Utilities.Config.GetConnectionString(String name) +47
   DotNetNuke.Common.Utilities.Config.GetConnectionString() +38
   DotNetNuke.Data.SqlDataProvider..ctor() +83

[TargetInvocationException: Exception has been thrown by the target of an invocation.]
   System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandle& ctor, Boolean& bNeedSecurityCheck) +0
   System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean fillCache) +103
   System.RuntimeType.CreateInstanceImpl(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean fillCache) +261
   System.Activator.CreateInstance(Type type, Boolean nonPublic) +66
   DotNetNuke.Framework.Reflection.CreateObject(String ObjectProviderType, String ObjectProviderName, String ObjectNamespace, String ObjectAssemblyName, Boolean UseCache) +582
   DotNetNuke.Data.DataProvider.CreateProvider() +47
   DotNetNuke.Data.DataProvider..cctor() +13

[TypeInitializationException: The type initializer for 'DotNetNuke.Data.DataProvider' threw an exception.]
   DotNetNuke.Entities.Portals.PortalAliasController.GetPortalAliasByPortalID(Int32 PortalID) +38
   DotNetNuke.Entities.Portals.PortalSettings.GetPortalAliasLookup() +74
   DotNetNuke.Entities.Portals.PortalSettings.GetPortalAliasInfo(String PortalAlias) +14
   DotNetNuke.HttpModules.UrlRewriteModule.RewriteUrl(HttpApplication app) +3527
   DotNetNuke.HttpModules.UrlRewriteModule.OnBeginRequest(Object s, EventArgs e) +826
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +92
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +64

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Version Information:

Microsoft .NET Framework Version: 2.0.50727.832;

ASP.NET Version: 2.0.50727.832

IIS Version: 6.0

OS Platform: Windows Server 2003

Please help me.. Thanks a lot.. :)