Cannot connect to the Jenkins slave machine when running Jenkins as a java prgoram

[Jenkins Johnny]

When I set up my Jenkins master as a windows service and attempt to connect to a slave machine using "Launch Jenkins via Java webstart", I can connect the slave server to the master fine with no issues.

However, I'm now required to launch the jenkins Master using "java -jar jenkins.war" so I can see the GUI interface being tested in realtime, but I cannot seem to create a connection to the slave machine this way (when I try to access the url on the slave machine, it says it cannot be displayed).

Is it possible to connect with jenkins while it is being run as a java program? Or is there an alternative method I can use?