are you able to login to the console by loggin in to the server? only remote is not working?
go to add/remove programs, remove the webconsole and any version of java installed.
http://sepmserver:9090
this should intall the correct java version and webconsole.. you should be able to log in fine.
if you have any proxy you need to allow the proper port as per this document
http://www.symantec.com/business/support/index?page=content&id=TECH103922&profileURL=https%3A%2F%2Fsymaccount-profile.symantec.com%2FSSO%2Findex.jsp%3FssoID%3D1364802568636Un0X6Fpa7z0dkJ5o5mbdvY7205q80A5dqn1hi