Error with SFTP: Not a socket

[reuben]

When running a manual backup over SFTP (either attended, unattended or background). I get an error.

Cannot access sftp://mydomain.com
(Not a socket (error code is 96259) at 00D38948)

This only seems to happen with the manual backups, as the scheduled ones works fine (running as a service).

I have tried reinstalling SFFS and recreating the profile.

[superflexible]

I really don't know, maybe it is a firewall issue?

[reuben]

I suspect it's possible, although I have similar setups on other systems without problem. Windows firewall is disabled (as far as I can tell) and the network firewall brand I use works in various other places.

Thanks for the help, I'll try some other things to see what I could figure out.