How do I go about becoming an eventplanner

This site may help:
Event Planning Careers (http://eventplanning.about.com/od/eventplanningbasics/u/event_careers_user_path.htm)

If you need more this search has several sites to help.
event planner qualificiations - Google Search (http://www.google.com/search?q=event+planner+qualificiations&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a)

You will probably have to find an entry level job with an event planning firm and work your way up. Unless you can show experience with planning events, its unlikely someone is going to give you an event to plan.