Webmin does not load after restart

[Los Frijoles]

I have a server running Ubuntu 8.04 LTS. I have webmin 1.420 installed on port 10000 using SSL. It works for a while after I install it, but then after a while (a few hours of idleness) or after a restart, webmin does not come up when I type in the server IP address:10000, the domain:10000 or localhost:10000. However, reinstalling webmin using the .deb package seems to fix the problem for a short period. However, I am going off to college soon and this problem needs to be fixed before I leave so that my brother doesn't loose his hair before he turns 18 from server stress...

Has anyone encountered this problem before? Any fixes?