Xupload Progress Bar Does Not Work On Linux Server

[color=#141823][font=Helvetica, Arial,]i use xupload extension. it works fine in localhost (windows), and server (linux). only the progress bar does not work in linux, but still the file being upload works correctly. if anyone know how to fix this, please let me know. [/font][/color]

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[color=#141823][font=Helvetica, Arial,]thank you. [/font][/color]