SES Keys not being saved

Hi,

I am hoping you can help as I seem to be having some problems saving new keys for SES, every time I add the new keys and save them they seem to not overwrite the old keys and won’t save, which then stops Mailster from sending as the keys aren’t recognised.

I haven’t made any other changes to mailster, so I’m at a loss now as to what the problem could be and hoping you could point me in the right direction.

Thanks for your help