Quest

If your older dryer (presumably electric type) is 3 prong 240VAC 30A type whereas your newer one (from your townhouse) is 4-prong (nicknamed "14-30") electric dryer type, your best bet is to either get a licensed electrician to retro your older dryer to run on 4-prong (new standards, since 1997), or get a plug adapter:

http://www.youtube.com/watch?v=ZBJhkyHSCmo

Q.