problem with fred-client

why do i get this error, and how to solve it ? : ----------------------------------------------------------------------------- REG-FO_A@localhost> create_domain ubb.fo ID004333 NULL NS2 (12 m) ID004333 Client-side validation command: xmllint --noout --schema "/usr/share/fred-client/schemas/all-1.4.xsd" - Do you really want to send this command to the server? (y/N): y Client-side validation command: xmllint --noout --schema "/usr/share/fred-client/schemas/all-1.4.xsd" - Return code: 2200 Reason: Authentication error COMMAND: domain:create <?xml version="1.0" encoding="utf-8" standalone="no"?><epp xmlns="urn:ietf:params:xml:ns:epp-1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:ietf:params:xml:ns:epp-1.0 epp-1.0.xsd"><command><create><domain:create xmlns:domain="http://www.nic.cz/xml/epp/domain-1.3" xsi:schemaLocation="http://www.nic.cz/xml/epp/domain-1.3 domain-1.3.xsd"><domain:name>ubb.fo</domain:name> <domain:period unit="m">12</domain:period> <domain:nsset>NS2</domain:nsset> <domain:registrant>ID004333</domain:registrant> <domain:admin>ID004333</domain:admin> </domain:create> </create> <clTRID>jjzt002#10-03-22at19:39:42</clTRID> </command> </epp> ANSWER: <?xml version="1.0" encoding="UTF-8"?> <epp xmlns="urn:ietf:params:xml:ns:epp-1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:ietf:params:xml:ns:epp-1.0 epp-1.0.xsd"><response><result code="2200"><msg>Authentication error</msg> </result> <trID><clTRID>jjzt002#10-03-22at19:39:42</clTRID> <svTRID>ccReg-0000000224</svTRID> </trID> </response> </epp>