Re: V9 very long delay on vm response Dave - The IVR web service is little more than an ASP.Net application run under either IIS or Abyss. As such, what this sounds like (and what the other thread described) was that the ASP.Net application that runs the IVR is timing out and shutting down. While the 3cx guys didn't explicitly say that, "abyss unloading the files" sounds like "abyss is unloading the unused asp.net app." ASP.Net apps typically shut themselves down after 10 or 20 minutes of inactivity. You're going to have the same issue with IIS - regardless of version. Try this - see if it fixes it. Download this application: http://www.smartertools.com/forums/t/14404.aspx Its called SmarterPing. Install it on your pbx machine. Configure it with the url of the ivr - something to the effect of http://localhost:5484/ - and set it to ping it every 5-10 mins. That should keep the application from unloading on you. You could do the same with the management and myphone apps if you wanted... I have NOT checked with 3cx support to see if this will resolve the issue... but based on my (extensive) experience with ASP.Net, I'd say its worth a shot. Let us know if this works!