You should be using Kies on a PC or Mac to update in that case...my tab already runs gingerbread. Kies will guide you through the update process. Don't know where you are located but here is a link for software upgrades/downloads on the Samsung Canada site. You have to select your model and then download and install Kies first.
http://www.samsung.com/ca/support/us...fulSwMobile.do