GPG problem

Hi all,
I have this problem when a client tries to authenticate. I 
copied the file trustedkeys.gpg on the gateway, and also I 
changed permission to server's directory 
/usr/local/nocat/pgp and to the keys in it. But it still 
doesn't work. It seems not able to sign the outcome 
message. Here's /var/log/httpd/ssl_error_log:

[Fri Apr 21 09:58:42 2006] [error] [client 172.16.10.100] 
[2006-04-21 09:58:42] User UNKNOWN from 172.16.10.100 
requests form[Fri Apr 21 09:58:47 2006] [error] [client 
172.16.10.100] [2006-04-21 09:58:47] User monica from 
172.16.10.100 requests form, referer: 
https://172.16.10.123/cgi-bin/login?redirect=http%3a%2f%2fwww%2egoogle%2eit%2f&timeout=600&gateway=10%2e0%2e0%2e1%3a5280&mac=00%3a10%3aA7%3a0A%3a61%3a62&token=%241%2410386088%24dFHjuPPVFOjaTgijIvkC7%2f
[Fri Apr 21 09:58:47 2006] [error] [client 172.16.10.100] 
[2006-04-21 09:58:47] gpg --sign --armor 
--homedir=/usr/local/nocat/cgi-bin/../pgp --keyring 
trustedkeys.gpg --no-tty -o- returned error message:, 
referer: 
https://172.16.10.123/cgi-bin/login?redirect=http%3a%2f%2fwww%2egoogle%2eit%2f&timeout=600&gateway=10%2e0%2e0%2e1%3a5280&mac=00%3a10%3aA7%3a0A%3a61%3a62&token=%241%2410386088%24dFHjuPPVFOjaTgijIvkC7%2f
[Fri Apr 21 09:58:47 2006] [error] [client 172.16.10.100] 
gpg: Sorry, no terminal at all requested - can't get 
input, referer: 
https://172.16.10.123/cgi-bin/login?redirect=http%3a%2f%2fwww%2egoogle%2eit%2f&timeout=600&gateway=10%2e0%2e0%2e1%3a5280&mac=00%3a10%3aA7%3a0A%3a61%3a62&token=%241%2410386088%24dFHjuPPVFOjaTgijIvkC7%2f
[Fri Apr 21 09:58:47 2006] [error] [client 172.16.10.100] 
[2006-04-21 09:58:47] gpg --sign --armor 
--homedir=/usr/local/nocat/cgi-bin/../pgp --keyring 
trustedkeys.gpg --no-tty -o- returned error:  ( 2 ), 
referer: 
https://172.16.10.123/cgi-bin/login?redirect=http%3a%2f%2fwww%2egoogle%2eit%2f&timeout=600&gateway=10%2e0%2e0%2e1%3a5280&mac=00%3a10%3aA7%3a0A%3a61%3a62&token=%241%2410386088%24dFHjuPPVFOjaTgijIvkC7%2f
[Fri Apr 21 09:58:47 2006] [error] [client 172.16.10.100] 
Can't call method "text" on an undefined value at 
../lib//NoCat/AuthService.pm line 134., referer: 
https://172.16.10.123/cgi-bin/login?redirect=http%3a%2f%2fwww%2egoogle%2eit%2f&timeout=600&gateway=10%2e0%2e0%2e1%3a5280&mac=00%3a10%3aA7%3a0A%3a61%3a62&token=%241%2410386088%24dFHjuPPVFOjaTgijIvkC7%2f
[Fri Apr 21 09:58:47 2006] [error] [client 172.16.10.100] 
Premature end of script headers: login, referer: 
https://172.16.10.123/cgi-bin/login?redirect=http%3a%2f%2fwww%2egoogle%2eit%2f&timeout=600&gateway=10%2e0%2e0%2e1%3a5280&mac=00%3a10%3aA7%3a0A%3a61%3a62&token=%241%2410386088%24dFHjuPPVFOjaTgijIvkC7%2f

Any idea?
Thanks