Maybe you will need to overclock them I check the cgminer command you can adjust the frequency of this USB stick. Read the command line below
--compac-freq <arg> Set GekkoScience Compac frequency in MHz, range 100-500 (default: 150.0)
Or if not then try to seek help from this official thread below don't forget to read the first page there are some commands that I think you can try.
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https://bitcointalk.org/index.php?topic=1173963.0Also read all commands here
http://ck.kolivas.org/apps/cgminer/