Latex Error

What I want to do is to add a screenshot BMP file to my latex document .
But it always fails . It shows the following error.

[6] (./sec4.tex

! LaTeX Error: Cannot determine size of graphic in img/brew_result1.bmp (no siz
e specifed).

See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...

l.5 ...degraphics[scale=0.4]{img/brew_result1.bmp}

?
! Emergency stop.
...

l.5 ...degraphics[scale=0.4]{img/brew_result1.bmp}

Output written on thesis.dvi (9 pages, 18248 bytes).
Transcript written on thesis.log.


how to solve it?

Solution 1.I download en BMP to eps converter and convert your BMP file to eps . But it will make your colored image to black and white . Here is a eps converter .
http://www.vector.co.jp/soft/dl/win95/art/se176316.html

Solution 2.Still looking .

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