(ExtJS 4.x) Mask not showing in IE 8

I have a wait massage that is being shown to cover the page until the call is done with database and it doesn't work in IE 8, though it works for FF, the code I am using is

panel.body.mask('Loading. Please wait...', 'x-mask-loading');

and when it finishes the call i make it dissapear by

panel.body.unmask();

this wo开发者_运维技巧rks in FF however in IE it doesn't do any effects, but the forms are submitted.

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Try this, one google search away, first hit.

http://www.sencha.com/forum/showthread.php?89107-doesnt-display-masking-panel-in-IE8