Hello all, I'm installed successfully Zimbra on a FC4, but when i send any mail from Zimbra webmail, pop-ups this error:

Code:
constructor - 
function ZmCsfeException(msg, code, method, detail) {
    if (arguments.length == 0) {
        return;
    }
    AjxException.call(this, msg, code, method, detail);
}

toString - 
function () {
    return "ZmCsfeException";
}

dump - 
function () {
    return "AjxException: msg=" + this.msg + " code=" + this.code + " method=" + this.method + " detail=" + this.detail;
}
This error ocurrs in internal and external mails... no difference. telnet to localhost 25 is ok. enable/disable dns lookup doesn't matter and /etc/init.d/zimbra status says me that all is ok and running:

Code:
RESPONSE: (Zimbra::Mon::serviceInfo)
        antispam
                status              Running
        antivirus
                status              Running
        ldap
                status              Running
        mailbox
                status              Running
        mta
                status              Running
        snmp
                status              Running
Any ideas?

Thanks in advance