Using a template

Hi,
Please, I am trying to use a journal template:
http://www.inderscience.com/www/download/LATEX-singlecolumn_18012007.zip
I was able to include the Document class, but the file gives the following
error:
-------------------------------------------------------------------
LaTeX Error: \newblock undefined.

\begin{thebibliography}{15}

Try typing  <return>  to proceed.
If that doesn't work, type  X <return>  to quit.
-------------------------------------------------------------------
and will not compile.

I am sorry but I new to Latex, I will appreciate your help.
Thank you
Hesham