You may want to try a different graphics card known to be compatible with your server and operating system.
Alternatively, you could consider using a VGA splitter to split the VGA output into two monitors. However, please note that this will only duplicate the display and not extend it.
Another option is to use remote desktop software that supports multiple monitors, such as Microsoft Remote Desktop or TeamViewer. This would allow you to access the server from a different computer and extend the display across multiple monitors.
PC Hardware Specialist