I did not do anything strange
I test the plugin system by installing another copy of links-SQL on the server, and it have the same problem.
the internal fileman have the same problem, but an external fileman (fileman.cgi) works fine.
And I get a perl error with perl check and plugin wizard.
Could it be a server problem????
Here is the system information:

System Information
======================================
Perl Version: 5.00404
Links SQL Version: 2.0.2
Persistant Env: mod_perl (0) SpeedyCGI (0) Config (0)
@INC =
/home/www/ridesworld/cgi-bin/meo/admin
/usr/lib/perl5/i386-linux/5.00404
/usr/lib/perl5
/usr/lib/perl5/site_perl/i386-linux
/usr/lib/perl5/site_perl
.

I really don't know what I do wrong.