Problem with Attachment.php

I am using Xunlei and for some reason I couldn't get the pop up to download anymore. I can only download "attachment.php" and that's it!TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。 a) p: s% D9 J" `9 ]( I
os.tvboxnow.com. y u, I* T: f! V. | e* E$ u& k
I believe I've done something to ".php" default program.
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Anyone please help. Thanks