Custom Error Message for file element - zend-framework

Question

I am trying to add custom error message to my file element validator. It is working for all the elements, BUT file. Kindly point out where am I going wrong. I know similar question has been asked before but I want to know what is the problem with this code?
$file= new Zend_Form_Element_File('albumcover');
$file->setAttrib('size',35)
->removeDecorator('label')
->removeDecorator('htmlTag');
$file->setRequired(true)
->addValidator('Size',true,'1MB')
->addValidator('Count',true,1)
->addValidator('IsImage',true,'jpg,jpeg,png');
$file->addErrorMessage("Upload 'jpg,jpeg or png' file of less than 1MB in size");
It shows predefined errors not the error message that I have set

Answer 1

You may want to do this in the controller to check if the element has an error and print a specific error message.
$form = My_Form_File();
...
if ($form->isValid()) {
...
} else {
if ($form->getElement('albumcover')->hasErrors()) {
$form->getElement('albumcover')->addError("Upload 'jpg,jpeg or png' file of less than 1MB in size");
}
}
Though I would recommend letting the user know in the description with
$file->setDescription("Upload 'jpg,jpeg or png' file of less than 1MB in size");