sftp to vip address

Trying to sftp to a vip address using winscp but cant figure out how to ignore the hostkey check.
StrictHostKeyChecking=no
I've tried to add this to the WinSCP.ini file under:-

[Configuration\Interface]
RandomSeedFile=%25APPDATA%25%5Cwinscp.rnd
PuttyRegistryStorageKey=Software%5CSimonTatham%5CPuTTY
StrictHostKeyChecking=no

doesn't seem to make a difference, not sure what i'm doing wrong here?
Changing the hostkey on the servers is not an option unfortunately.

Any help much appreciated

...sorry forgot to say I also treid to put the entry under
[SshHostKeys]

i'm unable to access the winregistry and so storage is set to ini file under prefrences

There's no StrictHostKeyChecking option in WinSCP. Moreover in OpenSSH is does not do what you want to do. Anyway, there's no way to ignore host key check in WinSCP or in any other decent SSH client.