help with clue scroll please

I am not able to obtain the equipment (sextant, chart, and watch) to get to coordinates for a clue scroll. I have talked to the professor, the brother monk dude, and the fisherman guy at the trawler. I have talk to them while carrying the scroll and without. I have talked to the professor first, second, and last. and still nothing. Can anyone help please? Thank you in advance. It will be much appreciated. Momma

i quote from tip.it/runescape:

Co-ordinates

When you get a co-ordinate clue, it will say something like "04 degrees, 13 minutes North, 12 degrees, 45 minutes East". When you have this, examine it, and then head of to the house north of the Observatory. You can find the Observatory south-west of Ardougne, west of the Gnome Maze. Here you will find a professor, talk with him, and ask him to help you with treasure trails. He will tell you to get a watch and a sextant.

* To get the watch go to the clock tower (located south of Ardougne). Speak with brother Kojo and ask him for the watch.
* To get the sextant go to the Khazard Docks (located north-east of Yanille). Speak with Murphy and ask him for the sextant.

When you have those two, go back to the professor again, and he will give you a long lesson in how to use the sextant. And he will also give you a chart. If you didn't read or didn't understand it, see below.

How to use the sextant to get locations:

Now click 'Get location' Ok, when you have the sextant, click on it to 'look through' and get your location. However! Before it's able to tell you your position, you will need to click on the up and down arrows until you have the horizon in the middle of the eye piece. After that, use your right and left arrows to get the sun in the centre of the eye piece as well. When you have this, and your eye piece looks like the one to the right, click "Get location" under the sextant image (above your chat box).

How to use your location:

Now you know how to get your current location, but you still need to learn how to get to your desired location (the one on the clue scroll). First you want to find the right longitude (east-west). If your clue says something like 12 degrees, 56 minutes east, and you're at 6 degrees 12 minutes east, then you simply walk east until you hit 12 degrees. Once you do that, you can try to hit the minutes by going a little more east. Then you try to find the right latitude (south-north). Go north/south until you hit the right place. This can be tricky, and the first 5 times you'll have to think and try a lot to get it right.

To help you with finding the right location, I have made a little tool. Open it here.. This locator is not 100% accurate, but its pretty close, and it *should* give you an idea of were to go with your sextant for the right location.

When you're at the right location, and you've double checked it, dig with a spade on the spot. If there's already something there, pick it up and dig.

Note: When you follow a clue with co-ordinates, you will need to have the sextant, watch, chart and clue in your inventory to dig up the treasure.

Note: With co-ordinates in the wilderness you will always need to fight a level 74 Zamorak Wizard before you can get the casket containing your next clue/treasure. And even out of the wilderness you'll get attacked, when doing level 3 co-ordinate clues, you'll most likely have to face the level 108 Saradomin Wizard, he uses both Melee and Magic attack, so be aware.