How to force subtitles in VLC to display at bottom [closed]

I need some help in forcing subtitles to be displayed at the bottom(to be exact, in those black bars). I've tried the tools->preferences and then subtitles option-> I've tried by giving 150px, but subtitles are still being displayed on the image(movie). Could anyone help me in doing this?

Click "Tools" on VLC's main menu bar. Click "Preferences" on the drop-down menu.

Click the "Subtitles & OSD" icon in the left-hand pane of the Preferences window.

Enter a value into the "Force subtitle position" text box at the bottom of the "Subtitles & On Screen Display Settings" window. A positive value moves the subtitles upward on the screen; a negative value lowers the subtitles.

Read more: How to Change the Position of Subtitles in VLC | eHow.com

also see this how-toforce-subtitles