backup.pex changed in version 4?

does anyone know if backup.pex changed in version 4? i am backing sites up to a backup server and with version 4 it is complaining about FTP timeout. on version 3.0.4 it ran fine. this is what i am getting on ver 4:

the fail email i receive contains:

Your NodeWorx Server Manager
FTP Timeout Error

proftpd settings on both sending/receiving servers are actually quite generous on timeout.

issue has been resolved. it was an APF issue on the receiving server.