MacBook Pro not recognizing USBs on Dell monitor

I have a 2013 MacBook Pro running Mavericks 10.9.1. I recently purchased a Dell UltraSharp U2312HM 23" IPS LED LCD Monitor to use for some graphics work. I am using a port to miniport cable to connect and have had no problems setting and calibrating displays to work the way I want. My problem is that I am now using the only 2 USB ports on the laptop for my mouse and keyboard. The monitor has 4 USB ports and when I plug any type of device into them (apple keyboard, flashdrive, mouse wireless antenna, etc.) the computer does not recognize them or even notice them. Can I get the USBs on the monitor to work? If so how? Thank you in advance.

one more point to add...i installed windows using bootcamp, and through windows the 2560X1440 resolution works. so its not a hardware problem either

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MacBook Pro not recognizing USBs on Dell monitor

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