Zelda 64: Ocarina of Time Questions

Hey team i'm having problems I have the broken biggorons sword but when I show it to the giant goron it says the item does'nt work here what the hey is going on.

Date of Question: Apr 27th 2007 | Question ID: 83401

To get the Biggoron's Sword, one that doesn't break - you have to do the following things:
1) As an Adult, go to Kakariko Village and talk to the Cucco Lady. She will give you an Egg - play the Sun's Song twice and the Egg should hatch. Go to the House where Talon is sleeping and use the Pocket Cucco to wake him up. Now talk to him, then go present the Pocket Cucco to the Cucco Lady. She will give you Cojiro, a rare blue Cucco.
2) Get to the Lost Woods from Kokiri Forest, go to the left, show the guy by the Tree Stump Cojiro and he'll give you an Odd Mushroom.
3) Now you have 3 minutes to get back to Kakariko Village (use Epona across Hyrule Field). Up near the exit to the Death Mountain Trail is a Shop on the right - enter it and take the passageway to the left to get to the back of the building. Jump off that ledge, go up the stairs, enter the other building and talk to the Old Lady. She will use the Odd Mushroom to make an Odd Potion.
4) Take the Odd Potion back to where you used Cojiro in the Lost Woods and got the Odd Mushroom. The guy'll be gone, but the Kokiri Girl in his place will take the Odd Potion and give you the Poacher's Saw.
5) Go to Gerudo Valley, present the Poacher's Saw to the guy by the Tent and he'll give you the Broken Goron Sword for it.
6) Time to meet the biggest Goron you'll ever see - go to the top of the Death Mountain Trail. Talk to the Goron, show the Broken Goron Sword to him and he'll give you a Prescription.
7) Now go to Zora's Domain, present to King Zora the Prescription and he'll give you an Eyeball Frog.
8) Ride Epona to Lake Hylia, enter the Lakeside Laboratory and show the Scientist the Eyeball Frog to get the World’s Finest Eye Drops.
9) Use Epona to get to Kakariko Village, go to the Death Mountain Trail and get to the top of it again. Give the Goron those Eye Drops and you'll get a Claim Check.
10) Play the Sun's Song 8 times, use the Claim Check on the Goron and he'll give you the unbreakable Biggoron's Sword!