amazon product ranking

When a new product is listed in [login to view URL], it might take quite a while to show up in first page search result. It seems the ranking result depends on the seller's performance history, key words search history, etc. I am looking for someone who have experience bring new product's ranking into first page in amazon.com. I sell one range of products, all 4 models show in 1st or 2nd page when search the key word in amazon.com. I list another model in [login to view URL], but it didn't show up in first page after 2 months. Since it was not shown there, people don't know it and won't buy it. You must have experience in this work as this is very special task. If you can do this, I have another 3 products to be working on.