Set Status on phone call record just created

I have created a phone call record to log a call when required when a Contact record is saved using an After Submit Scipt.

I can set all the fields I want except the status to 'Completed' rather than the default of 'Scheduled'.

Sample code with carious attempts commented out below. any ideas?

recordCreated.setFieldValue('title',title );
recordCreated.setFieldValue('organizer', salesrep);
recordCreated.setFieldValue('contact', contact_id);
recordCreated.setFieldValue('phone', phone);

//recordCreated.setFieldValue('priority', 'high'); this did not work either??!!

recordCreated.setFieldValue('message',comments);

//set field Values - for multiselect field
var state = new Array(1);  
state['0'] = 'completed';
//recordCreated.setFieldValues('status', state);   3rd attempt