Swap magic on ps2 hard drive

i have swap magic 3.6 on my hard drive i boot hard drive with hd loaded exploit then put in my back up select swap magicthen when i hit x to boot it says not valid ps2 disk i donk use a slide tool of flip top is this the proublem or is it the backup its self then i used the swap magic on mc it would ack for bigger toc when i eject but now just says not a valid ps2 diskcould this method work if a had a good backup the games i’ve tried are d ball z 3 and alter beast please post your thoughts maybe i’m on to something