LOADUI is discarding the request on increase queue count

Hi

Sometime because of the server slowness or increase in the response time queue count is increasing and at certain time few of the request are getting discarded.
I am using LoadUI 2.1 version.

And also if the request count is more than 1 million then in this case count is not showing correctly on the SoapUI Runner Window.

Response to the query is highly appreciated.
Thanks,
Rajdeep