MIUI download icon won't go away issue [solved]

I flashed a MIUI rom on my HD2. One day I tried to use the browser on the phone to download an APK, but it failed. The download icon on the top left corner of the screen then sticks. I tried reboot, downloading the APK again, and clearing the browser data cache, none worked. Finally, I found a software called "Download Manager" in the applications. I cleared the data and cache of that software, and the download icon disappears.