Bandwidth test on RB433AH using UDP packets = 0 Packets

I have a RB433AH router on my network and I can run a Bandwidth test using “tcp” and get 30, 40 and 50 Mbps speed. I run the same test and select “udp” and get NOTHING!! Does anyone have any idea what could be causing this? In my firewall on this router I have it set to “Accept” all.

Please advise.

What is the maximum packet size that you can forward over that link? If it is less than 1500 and you will try to run BW test with 1500 byte packets then it will not work.