
Hi there :)
Mallies are very quick to learn where they can pee and poo , unfortunately your pup has just learnt the wrong place :) I would remove the paper all together as they are just confusing the issue. Start over again, taking her out every 15-30 minutes and praising when she does something.
Don't worry about the not peeing on a walk thing...LOTS of dogs won't go whilst they are out. One way of combatting this is to say a certain word when you take her into the garden ..this way she will get trained to pee on command almost ..we always tell pups to 'Hurry Up!' but it can be anything you like, just repeat it until she pees and THEN praise a lot. Gradually you will be able to use that same word when you are out on a walk and she will *go*
As JG says, she should NOT be going on 2 hour walks at 14 weeks. Try to follow the 5 minute per month rule. She should be having 2 or 3 walks of about 15 minutes each :)
Email me if you have any questions or I can help in any other way :)