Okay, I'm not exactly sure what you said, but just know, that on White, you must go to the Transfer Lab, while the DS with the Soul Silver or Platinum MUST go to DS Download.
After that, you will play a mini-game to catch six Pokemon you're migrating.
If you're trying to trade from White to Platinum or Soul Silver, it just isn't compatible. They will not connect with each other.
Hope you figure out your problem! ~