Wallet Passphrase Assistance :)

I recently resurrected a reddcoin wallet from 2014. I thought I had the passphrase as I have a written down version of it however it does not work. Of course this could be the wrong passphrase and related to something else however it was definitely similar.

Are there any compatability issues I am overlooking as I have simply downloaded the latest version of reddcoin and linked to my old wallet,dat file?