Obvious I know but has the water been turned on? Is there a on off valve for the water supply or an extra in line valve somewhere that was turned off to install? Otherwise try this site that has just helped with the opposite problem - water not draining!
http://www.repairclinic.com/0088_9_1.asp
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix dishwashers.