rsync - Apr 2002 - WARNING: --rsh or -e option ignored when connecting to rsync daemon

i faced a problem as below :

WARNING: --rsh or -e option ignored when connecting to rsync daemon

when i trying to sync between 2 remote server, Sun 2.8 and AIX 4.3.3

Sun Rsync - 2.5.4
AIX Rsync - 2.4.5

isn't ok for this 2 different version of rsync to communicate each
others,

don't it affect by ssh daemon/version as well

kindly advise