You may want to check the logical distance between the injector and the collector. Remember when you run an injector it is sending events over your link to your collector with a min delay time. Your network team could think this is a DOS.
With the injector, there is a switch in which you can throttle how many events per second you are sending? What is that set at? I am assuming you are leveraging the %_ENVISION%\bin\injector.exe
Look at the -?