I get that message all that time, FileFront is a garbage site anyways. Wish the good modder could find a FREE server to post these mods!
There are some good server that allow DL without having to register or have java an cookies enabled, but they don't seem to want to use them.
http://U-Boot.realsimulation.com use to be a good site to DL SH3 MODS but they went registed only....