You can take a few measures to troubleshoot the problem if your trading program doesn't function on the VPS. First, ensure your trading software is compatible with the VPS host's settings and operating system. The specs offered by the VPS hosting provider should be compared to the system requirements of your trading program.
You can ask the support staff of the VPS hosting provider for help if compatibility is not the problem. A few VPS hosting companies offer pre-installed trading platforms or help customers install and set up trading software on their dedicated servers.