There are some things you can do to check performance. For example, assign the IP manually. If there is a problem with getting the IP, then setting it manually will overcome this. There is also a software guide that provides all the necessary information related to the way the application works. You can download it using the link below.
There is also the possibility that you are using a trial version of the program, which is limited in functionality, and the full package needs to be obtained to use it without issues.
PDF user guide: ftp://99.47.14.3/pub/readers/software/gateway/v2.21.00/Guide,%20Demonstration%20Software,%20RFID%20Gateway.pdf