Issues with Lync Installation

I've been fighting a Lync installation for a long time.
It craps out on me at this point:
Error: Command execution failed: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index
¿ Details
+ Type: PowerShellException
+ ¿ Stack Trace
    +   at Microsoft.Rtc.Internal.Tools.Bootstrapper.BootstrapperTask.ActivateNewRoles()
at Microsoft.Rtc.Management.Internal.Utilities.LogWriter.InvokeAndLog(Action action)
 
+ ¿ Additional Details
    +   Error: Command execution failed: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index
¿ Details
+ Type: CmdletInvocationException
+ ¿ Stack Trace
    +   at System.Management.Automation.Internal.PipelineProcessor.SynchronousExecuteEnumerate(Object input, Hashtable errorResults, Boolean enumerate)
at System.Management.Automation.PipelineNode.Execute(Array input, Pipe outputPipe, ArrayList& resultList, ExecutionContext context)
at System.Management.Automation.StatementListNode.ExecuteStatement(ParseTreeNode statement, Array input, Pipe outputPipe, ArrayList& resultList, ExecutionContext context)
 
+ ¿ Additional Details
    +   Error: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index
¿ Details
+ Type: ArgumentOutOfRangeException
+ ¿ Stack Trace
    +   at System.ThrowHelper.ThrowArgumentOutOfRangeException()
at System.Collections.Generic.List`1.get_Item(Int32 index)
at Microsoft.Web.Administration.ConfigurationElementCollectionBase`1.get_Item(Int32 index)
at Microsoft.Rtc.Management.Deployment.Roles.WebServices.LocalActivate(IService service, Computer computer)
at Microsoft.Rtc.Management.Deployment.Core.Service.LocalActivate(Computer computer)
at Microsoft.Rtc.Management.Internal.Utilities.LogWriter.InvokeAndLog[T](Action`1 action, T arg)
at Microsoft.Rtc.Management.Internal.Utilities.LoggableExtensionMethods.InvokeAndLog[T](ILoggable loggable, Action`1 action, T arg)
at Microsoft.Rtc.Management.Deployment.Tasks.HostLocalActivateTask.Action()
at Microsoft.Rtc.Management.Internal.Utilities.LogWriter.InvokeAndLog(Action action)
at Microsoft.Rtc.Management.Internal.Utilities.LoggableAction.InvokeAction()
at Microsoft.Rtc.Management.Deployment.ActivateMachineCmdlet.InternalProcessRecord()
at Microsoft.Rtc.Management.Deployment.DeploymentCmdlet.CmdletProcessRecord()
 

I can't make any sense fo the error.  Was hoping someone would be able to point or even push me in the right direction.

Thanks,

Mark