wrong date with last command

I use the last and lastb command to see what accounts have been logged into and to see if there is any unusual logins. The date and time for FTP and console logins are correct, but for telnet and ssh logins the date show up as username pts/3 Thu Jan 1 00:00 is there a way to fix this? did someone change something? using Suse 6.4 thanks Dany Allard