Limit of concurrent connections

Hi all,

I am using a webservice to get requests from clients. While monitoring the server I noticed that if the number of requests is greater than 200 then the perfmon counter "Web Service\concurrent connections" shows only 200 concurrent connections.

If the requests are less than 200 then the perfmon counter shows the right number of connections.

Is there any limitation in IIS or is related to ASP.NET(the webservice is based on ASP.NET)?

Thanks,