Authorized User, raise credit score, how long?

I had been trying to improve my credit score for the past 3 months. My scores have risen very little. The are 591(equifax), 603(experian) and 623(trans). I just added two trade lines to my account as an authorized user on7/10 with 7,500 credit limit and 7 years of history but my credit score did not move. How long does it take for the score to increase? Thanks,
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they just came out with a new score system which cuts the piggy back autorized user thing out.
You must have some bad stuff that needs to be paid or removed and some is recent.
So get recent good credit. In 1 year your score will go up 50 points with no new bad credit and all new good credit and all past balances zeroed out.
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I was told that the new system to stop piggybacking would not role out untilseptember for one bureau then the other two bureaus would pick it up laterin the year.
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Probably so.
My intention was to say.
Get good credit on your own name.
Takes 1 year to help your score.