First, you should complain to him in writing about the problem(s) and send him a certified letter stating the problems via U.S.mail. You should include photographs of the problems if you have them. Next, you should wait 5-7 days for a response or for the necessary repairs to be made. If your landlord fails to respond, contact your local building inspector, health inspector, and your state's section 8 housing authority. You should also contact your local news and/or create a website and YouTube video. http://www.youtube.com/watch?v=Eev771XMCJg
You may also want to report your situation to Orange County and City of Orlando housing authorities. If you are unsure of your rights, you should consult an experienced real estate lawyer in your area.
Disclaimer: This answer is provided for informational purposes only, does not constitute legal advice, and does not create an attorney-client relationship. Actual legal advice can only be provided after completing a comprehensive consultation in which all of the relevant facts are discussed and reviewed.