connecting tomcatt 4.1 with apache 1.3 on windowsXP

[Indhu Mohan]

I placed the mod_jk2-1.3.27.dll file under apache\modules and added the following in httpd.conf

LoadModule jk_module modules/mod_jk2-1.3.27.dll
AddModule mod_jk.c

When i start the server i get the following error

Syntax error on line 989 of c:/program files/apache group/apache/conf/httpd.conf
: Can't locate API module structure `jk_module' in file c:/program files/apache group/apache/modules/mod_jk2-1.3.27.dll: (127) The specified procedure could not be found:

should i be using mod_jk2-1.3.27.dll??? I downloaded jakarta-tomcat-connectors-jk2.0.4-win32-apache1.3.29.zip form apache site and that had mod_jk2.so.What is the difference between .so and .dll ?

could someone tell me what i should be doing now.