My Rat's Ramp always falls?

I have a custom tank (50 gallon fish tank with a wood top that has a cage attached) and the ramp always falls into tank and the top's heavy so it's always so hard to get it when it drops. I've tried using pliers to bend the hooks to stick onto the platform but I don't have needle nosed pliers so I can't. I'd just let them climb the rope but one of my four rats is only four weeks old so she doesn't get the concept. Any suggestions to make the ramp stay because it's really irritating when it falls!