Setting up a PACS connection can be a complicated procedure.
You need to configure both RadiAnt PC and your PACS server, so that they know each other's connection parameters (AE title, IP address, port number).
It requires thorough knowledge and experience in the DICOM networking field and the access to the PACS server's configuration interface.
We can only point some topics in our manual, as the remote assistance is not possible.
Please use your local IT support specialized in the PACS field.
https://www.radiantviewer.com/dicom-viewer-manual/pacs-configuration.htm
https://www.radiantviewer.com/dicom-viewer-manual/pacs-troubleshooting.htm