Hello, I want to connect a remote TIBCO EMS server, but why soapui is trying to connect to localhost

What is the operating system you are using? Hope you have right configurations set for hermesJMS.

Also it is worth to check the hermes library file that is available under soapui_home/lib and hermesJMS/lib. Try the one under hermesJMS by replacing under SOAPUI_HOME/lib (use same file name as it appears there, which may be different under hermes)