[rules-users] how to write regular expressions in drools..

HI Guys, present i am using drools 4.0 in this case.now, i am writting some rules validation using regular expression ZIPCODE,EMAIL,CREDIT CARD number.like this.. -------------------- validation.dslr -------------------- rule "email.mandatory:[insert][update][ui]" when There is an Order Order email address checking for first letter then Reject with response : "email address must not start with @ " end rule "phone.mandatory:[insert][update][ui]" when There is an Order Order phone number format should checking then Reject with response : "The phone number you entered is not valid.Please enter a phone number with the format xxx-xxx-xxxx."\ end ----------------------- validation.dsl -------------------- [*][]Order email address checking for first letter= OrderBean(email matches "@[A-Za-z0-9]*") [*][]Order phone number format should checking=OrderBean( phone not matches "(/\d{3}\-\d{3}\-\d{4}/)==-1)") this rules are not working ...any one can help me.ASAP thanks, chanti