Ошибка при отправке нотификаций?

Ото не ошибка а огрызок стэка ошибки, приведите полный текст ошибки с полным стеком, тогда можно будет попытаться угадать что там было не так. Пока это гадание по кофейной гуще.

Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.Threading.Tasks.TaskSchedulerException
Stack:
at System.Threading.Tasks.Task.ScheduleAndStart(Boolean)
at System.Threading.Tasks.Task.InternalStartNew(System.Threading.Tasks.Task, System.Delegate, System.Object, System.Threading.CancellationToken, System.Threading.Tasks.TaskScheduler, System.Threading.Tasks.TaskCreationOptions, System.Threading.Tasks.InternalTaskOptions, System.Threading.StackCrawlMark ByRef)
at System.Threading.Tasks.TaskFactory.StartNew(System.Action, System.Threading.Tasks.TaskCreationOptions)
at PushSharp.Core.PushServiceBase+ChannelWorker..ctor(PushSharp.Core.IPushChannel, System.Action`2)
at PushSharp.Core.PushServiceBase.ScaleChannels(PushSharp.Core.ChannelScaleAction, Int32)
at PushSharp.Core.PushServiceBase.CheckScale(System.Object)
at System.Threading.TimerQueueTimer.CallCallbackInContext(System.Object)
at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.TimerQueueTimer.CallCallback()
at System.Threading.TimerQueueTimer.Fire()
at System.Threading.TimerQueue.FireQueuedTimerCompletion(System.Object)
at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
at System.Threading.ThreadPoolWorkQueue.Dispatch()
at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()