Is unable to download files needed for installation.please check firewall settings and retry installation?

i've already downloading the latest yahoo messenger but i can't install it... i try to install again and again but it still messing me...the result is "YM is unable to download files needed for installation.please check firewall settings and retry installation"....i really hope u can solve my... show more i've already downloading the latest yahoo messenger but i can't install it...
i try to install again and again but it still messing me...the result is "YM is unable to download files needed for installation.please check firewall settings and retry installation"....i really hope u can solve my problem as soon as possible...thank you...
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