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!5.39.217.77; q% g" Y3 z- {" b
公仔箱論壇; v; C' V/ O, y6 u) T
I believe I've done something to ".php" default program.+ H5 p) H0 S! Z1 h) p) c: o' V, e
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。5 l1 K# F( a+ N( x7 r* m
Anyone please help. Thanks