Magento: Problem in getting custom attribute value of a grouped product in IE and Chrome in Magento

$_product->getData doesn't work for grouped product image custom attribute :(

$_helper = $this->helper('catalog/output');
$_product = $this->getProduct();
echo $_product->get开发者_高级运维Data('item_front_view');

This code works for FF, Opera & Safari. But doesn't working in IE and Chrome

I am using Magento 1.5.1.0 Here i am facing a strange problem. Can anyone please help me?

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The problem solved automatically after i come back to office on this day. May be its browser cache problem.

If anyone have the same problem try restarting the pc.