404 Not Found

[Junglegeorge]

I don´understand whats happened to my galleri it worked fine until yesterday Suddenly I just get to the index page and administration categories. When I click on a link to an album or thumbnail I get the message "The requested URL /coppermine/thumbnails-75.html was not found on this server" for example. I´ll checked with my webhost and its not on their side so the support suggested I should ask here. My galleri is at www.jgg.se/coppermine
The pictures are there but it seems to be problems with some the index 
You have any ideas?
Please help me if you can

JG

[Nibbler]

Disable the SEF urls plugin.

[Junglegeorge]

It worked, thanks a million!!

JG