[xml] Link Error undefined reference

[bolton spaceshooter com]

I'm getting a link error when compiling libxml2 code in Dev-C++ / mingw /
WindowsXP.

Error:
  [Linker error] undefined reference to `_imp__xmlFree'

Code:
  http://xmlsoft.org/tutorial/apc.html

Versions:
  iconv-1.9.1.win32
  zlib-1.2.1.win32
  libxml2-2.6.18.win32

The code works fine if I replace "xmlFree" with "free".  Any suggestions?