ChilkatDotNet46.dll, version: 9.5.0.66 AccessViolationException at Imap.FetchBundle(messageSet) - net 4.0

I'm having a problem with Chilkat .Net 4 x64 ( Version 9.5.0.66 ). From time to time our service crashes with an AccessViolationException at searching in an IMAP inbox for new mails. May the new release versions resolve this Problem?

The Exception:

.NET runtime error: Application: BackgroundJobsService.exe Framework Version: v4.0.30319 Description: The process was terminated due to an unhandled exception. Exception Info: System.AccessViolationException

   at <Module>.ClsImap.FetchBundle(ClsImap*, ClsMessageSet*, ProgressEvent*)
   at Chilkat.Imap.FetchBundle(Chilkat.MessageSet)
   at RedAlerts.BackgroundJobs.EmailListener.ChilkatEmailIMAP.RetrieveInboxMessages()
   at RedAlerts.BackgroundJobs.EmailListener.EmailInterface.ProcessMailbox()
   at RedAlerts.BackgroundJobs.EmailListener.EmailInterface.DoWork()
   at RedAlerts.BackgroundJobs.Jobs.EmailListener.Execute(Quartz.IJobExecutionContext)
   at Quartz.Core.JobRunShell.Run()
   at Quartz.Simpl.SimpleThreadPool+WorkerThread.Run()
   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.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Threading.ThreadHelper.ThreadStart()

Application error: Faulting application name: BackgroundJobsService.exe, version: 6.2.7.14, time stamp: 0x5aaa92f6 Faulting module name: ChilkatDotNet46.dll, version: 9.5.0.66, time stamp: 0x58d3c4a1 Exception code: 0xc0000005 Fault offset: 0x00000000002baf65 Faulting process id: 0x820 Faulting application start time: 0x01d5b65d1d2fa5bc Faulting module path: D:\Program Files\Server\bin\ChilkatDotNet46.dll Report Id: 00a9a792-0ba1-43f4-b175-f674092fcf8c Faulting package full name: Faulting package-relative application ID: