CNUT 425 ;Message: Error Transferring Files!!425 Can't open data connection

trying to update SM's on my network but there are 3 that throw this error and i am completely lost, only 3

I can't get them to update and i don't want to have to roll a truck, any asst plz


Please check the SNMP settings on those 3 SM's, the port settings , username and password. Also check for the connectivity of those SM's