it doesn't like hostnames with hyphens in 'em I'm afraid. Here is a fix for you to try
edit the file /opt/sark/www/cgi-bin/sarktrunk.pl
at or around line 184 you will find a line which looks like this
"desc" => qr/^([\w\s~]{3,30})$/,
replace it with this
"desc" => qr/^([\w\s~-]{3,30})$/,
That should allow your hyphens
Let me know how you get on with it.
S