Cannot open subsonic in browser

Problem Description: (I have been using subsonic with my roku successfully for 2 years. It quit working, so I reconfigured my roku settings with the exact same computer address, username and password that had always worked. It would not connect, so I checked the control panel on my computer and tried resetting these values with no result. Whenever I try to open subsonic in my browser, I get this error:HTTP ERROR: 503 SERVICE_UNAVAILABLE RequestURI=/subsonic Powered by jetty://" I tried resetting my port forwarding using PortForward, and it says the port is open.
Troubleshooting Steps: See above.
Playback Application and version:roku
Subsonic Version: 4.9
Server Version: I cant reach the server
Hardware Platform: Windows XP
Java Memory Limit: 150
Problem Filename: n/a
Output from ffmpeg -i: I don't understand this
Last ten log file lines: I cant reach the web interface
Troubleshooting Steps: See above.
Playback Application and version:roku
Subsonic Version: 4.9
Server Version: I cant reach the server
Hardware Platform: Windows XP
Java Memory Limit: 150
Problem Filename: n/a
Output from ffmpeg -i: I don't understand this
Last ten log file lines: I cant reach the web interface