every time i press "Staggered (Auto)" or "Build All" in my admin panel i get this error:

THEN I PRESS "STAGGERED (AUTO)" THIS HAPEN:

Building Pages
Step: Updating Home/New/Cool Pages

Pages built on 9-Apr-2000 at 18:59:51
--------------------------------------------------------

** Loading Category information . . .
** Done (0 s)!

** Loading Summary information . . .
** Done (0 s)!

** Creating Home Page . . .
Subcategories: 2
Total Links: 3
Opening page: e:\webs\netstuff.dk\wwwroot\pages/index.html
Closing page.
** Done (0 s)!

** Creating What's New Pages . . .

CGI ERROR
==========================================
Error Message : fatal error: Can't find unicode character property definition via main->a or a.pl at unicode/Is/a.pl line 0

Script Location : e:\webs\netstuff.dk\wwwroot\cgi-bin\links\admin\nph-build.cgi
Perl Version : 5.006

Form Variables
-------------------------------------------
auto : 1
staggered : 1
step : 4



AND THEN I PRESS "BUILD ALL" THIS HAPEN:

Backing up database . . . Backup exists for today.. Skipping Done. Building URL Index . . . Done. Updating New and Popular Records . . . What's New Cutoff: 14 days Popular Cutoff: 46 hits Updating record: 3, marking as popular (46). Updating record: 3, marking as new. Updating record: 5, marking as new. Updating record: 6, marking as new. Done. Updating ratings .. Done. Loading Category Information . . . Done. Gathering Category and Link information . . . Done Building Home Pages . . . Subcategories: 2 Total Links: 3 Opening page: e:\webs\netstuff.dk\wwwroot\pages/index.html Closing page. Done Building What's New Page . . .

CGI ERROR
==========================================
Error Message : fatal error: Can't find unicode character property definition via main->a or a.pl at unicode/Is/a.pl line 0

Script Location : e:\webs\netstuff.dk\wwwroot\cgi-bin\links\admin\nph-build.cgi
Perl Version : 5.006

Form Variables

I DONT KNOW WHATS WRONG BUT PLEASE HELP ME!!!