SEND EMAIL NOTIFICATION? Throws Error!

//SEND EMAIL NOTIFICATION
var emailRecipient = 29275;
var userID = nlapiGetUser();
var EMPName = nlapiLookupField("employee", userID, "entityid", null);
var MySubject = "This Test Email was created by: " + EMPName;
var messageBody = "\nCREATED BY: " + EMPName;
nlapiSendEmail(userID,emailRecipient,MySubject,messageBody,null);
//END SEND EMAIL NOTIFICATION

Can someone tell me what is wrong with the code above? When a button is pressed on a form, I want this code to fire...

The error comes at:
nlapiSendEmail(userID,emailRecipient,MySubject,messageBody,null);
Error: Object Expected.

I also tried with 2 nulls:
nlapiSendEmail(userID,emailRecipient,MySubject,messageBody,null,null);

Clint
(When I view this post, on my screen "mes sageBody" has a space in it. (But it doesn't in my code)