i used newspaper to help with my 13 week old pup, were the paper is he will pee so eventually we moved it to back door and now he goes out on his own and does his toilet, we have a dog flap to and that helps as he can go when he wants and doesnt have to wait for the door to be opened, you can also try putting the pup out as soon as it has fed and as soon as it wakes up these are the more likely time a pup will piddle, but most of all dont shout and curse the pup for getting it wrong just put itout and praise when its right. good luck

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