Ps2 Slide Tool Help Please!

Hi…I have just purchased the slide tool for the ps2…I have followed instructions but when it comes to loading the backup disc it says NOT A VALID PS2 DISC. I have slid the tool to the right and i think its hooked then i slide it to the right and the tray shuts then i press x but it says not a valid ps2 disc…I am confused and very annoyed… Please help me.

sounds like you have’nt closed the tray & loked it before presing X

here’s a swapmagic slidetool link of a video of it