# Troubleshooting

Use the following information to help troubleshoot issues with the WMS Interface.

XML payloads are case-sensitive. Ensure that you match the case exactly; otherwise, your command might fail and/or parameter updates may not have the intended effect.

If you have a conflict with another web server using the same listening port as the WMS Web GUI, you can configure the WMS Web GUI listening port to use a different port than the default. Following the steps below.

1. Edit /etc/httpd/conf/httpd.conf for WMS Web GUI.
2. Change Listen 80 to whatever port that you want.