Significant delay in CTIOS Events

I have .net 3^rd party call control application. All the request from my application to CTIOS server are working fine. But events are coming after significant delay.

For eg, if I get a call to my IP communicator then after 1-2 mins I get the event in my application for the same.

Cisco agent desktop also facing little lag but is not as significant as in my application.

Is there any way through which I can figure out whether the server sending the event after delay or is there any issue with my application

The issue is likely with your application.  You can check the CTIOS Server log to see if it shows any delay.  Also check your ctios client log for clues to delay.  Also, try using the .NET Combo desktop and see if you have delays.

Which SubscriberList Enum option are you using?

I have attached the possible values list.

You may want to check the samples they provide with the installation pkg. I like to use the AllAgents sample in order to see if my requests were received and processed correctly by CTIOServer