INVALID_FLD_VALUE for case/task/event in time record

Hi,

I am creating timesheet records through the user event script but in the script throw invalid field value project task but is closed.

var timeRecord= record.create({type:'timebill',isDynamic: true});

if(employee!=''&&employee!=null){

timeRecord.setValue({fieldId: 'employee',value:employee});}

if(travetime!=''&&travetime!=null){

timeRecord.setValue({fieldId: 'hours',value:travetime});}

if(trandate!=''&&trandate!=null){

timeRecord.setValue({fieldId: 'trandate',value:trandate});}

if(loc!=''&&loc!=null){

timeRecord.setValue({fieldId: 'location',value:loc});}

if(customer!=''&&customer!=null){

timeRecord.setValue({fieldId: 'customer',value:customer});}

if(cls!=''&&cls!=null){

timeRecord.setValue({fieldId: 'class',value:cls});}

if(casetask!=''||casetask!=null){