[syslog-ng] Need help with having Syslog-ng import a log file into syslog-ng

Need help with having Syslog-ng import a log file into Syslog-ng. I have a proxy server that will not syslog but will log to a file than can ftp of the server. I am wondering how I can take the ftped file and send it to the Syslog-ng so It can be sysloged to our database server for review? Any help would be great? Thanks.