When Receiving Incoming Calls I don't get any popups any idea

I don’t seem to get any popups when receiving inbound calls, I only get 1 pop up window and when another call comes in overwrite the current windown instead of opening in another window ANY IDEAS ? I did check the settings in WINDOWS 7 as well browser settings and tried to upgrade the browser as well don’t know what else to check or try??

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What application creates a popup on an inbound call? FreePBX does not perform this function.