I have build a method to handle emailing in a class called TripRptManager.  I requires no parameters.  It is not functioning but returns no errors.  Any ideas.  Thanks 

An Excerp:

The call in the controller is TripRptManager sendEmail;

The class:

public with sharing class TripRptManager {

//===============================================================
//Public attributes
//===============================================================

//===============================================================
//Utility methods
//===============================================================
public class SendEmail {
public String subject {get; set;}
public String body {get; set;}
private final Account account;

public SendEmail() {

account = [SELECT Name,
( SELECT Contact.Name, Contact.Email
FROM Account.Contacts)
FROM Account
WHERE Id = :ApexPages.currentPage().getParameters().get('id')];

}

public Account getAccount() {
return account;
}

public PageReference send() {

Messaging.SingleEmailMessage email = new Messaging.SingleEmailMessage();

PageReference pdf = Page.TripReportPDF;
pdf.getParameters().put('id', (String)Account.id);
pdf.setRedirect(true);

Blob b = pdf.getContent();

Messaging.EmailFileAttachment efa = new Messaging.EmailFileAttachment();
efa.setFileName('TripReport.pdf');
efa.setBody(b);

String addresses;
if (account.Contacts[0].Email != null) {
addresses = account.Contacts[0].Email;

for (Integer i = 1; i < account.Contacts.size(); i++) {
if (account.Contacts[0].Email != null) {
addresses += account.Contacts[i].Email;
}
}
}

String[] toAddresses = addresses.split(':',0);

email.setSubject( subject );
email.setToAddresses( toAddresses );
email.setPlainTextBody( body );

email.setFileAttachments(new Messaging.EmailFileAttachment[] {efa});

Messaging.SendEmailResult [] r =
Messaging.sendEmail(new Messaging.SingleEmailMessage[] {email});

return null;

}
}