First off welcome to the forums. Use the search button as much as possible as most topics have been beaten to death. It sounds like you are attempting to Sync your device with your data files on Outlook etc.
You need to setup Desktop Manager on your computer and then setup the program to mirror the data that is in your PIM (Outlook). See this post: http://www.blackberryforums.com/gene...c-outlook.html
Mark Rejhon has developed a huge post that discuss everything BB. See this link for further information about how to accomplish various items w/your BB: BIG FAQ! Software, Upgrade, Ringtones, Themes, Internet, IM, Modem, Tips+Tricks, Etc
Best of luck, once again welcome!