String-Date conversion help

I get the following error in a bean

on the statement

java.sql.Date.valueOf(2006-12-07)

16:06:29,298 INFO [STDOUT] java.text.ParseException: Unparseable date: "2006-12

-07"

16:06:29,298 INFO [STDOUT]at java.text.DateFormat.parse(DateFormat.java:33ng

where 2006-12-07 is the date I enter

[330 byte] By [omijoa] at [2007-11-26 13:16:34]