For your current beer: You are probably impatient. There will be a lag phase with the new pitch of 24-48 hours---pitching new yeast into alcohol is hard on the yeast. Take another gravity reading in 2-3 days. You won't get another Krausen, there isn't enough sugars left for that much activity to get going. You are just hoping for enough activity to finish off the remaining sugar: a few airlock bubbles is all you should expect. The new reading should show a declining SG trend, but it may be slow.
When you re-pitch into a partially fermented beer, you need to pitch the starter when it is at high-Krausen. Was this the case? Otherwise, the yeast have a very hard time adjusting to the alcoholic environment, and will probably just go dormant.
Also, warm the beer up by 5 degF (3 degC). That will help the yeast get the job done, and won't affect flavor at this stage.
Now for future beers: Don't rack to a secondary. There's no need. It doesn't do anything good, it doesn't protect the beer from autolysis, it doesn't aid in clarifying the beer, or anything else. There are really only two reason to ever rack to secondary:
[list type=decimal]
[*]To ADD a new ingredient (coffee beans, cocoa nibs, vanilla beans, fruits, different yeast/bacteria culture, a special fining agent, etc)
[*]To bulk age for longer than 6 weeks
[/list]
If you are just making a normal beer (malt, hops, water, yeast) that you ferment for 5-14 days, and then clarify and bottle, its a waste of effort, and will only serve to decrease the quality of the beer. At best, you do nothing...at worst, you introduce oxygen which stales the beer, and/or an infection which makes it taste funny (or worse), or causes a stuck ferment (in your case).
Even if you choose to continue to move the beer to a secondary...NEVER do it before the primary fermentation is complete. That is determined by gravity readings, not a calendar. After a week, take a reading. Wait two days and take another reading. If the readings are the same...you can do anything you want with the beer. If the second reading is lower then wait two more days. Continue this until the last two readings are the same.