Getting error in ejabberd when add any module in ODBC mod - mysql

Question

I have installed ejabberd to implement my chat application, I have also successfully installed Mysql module and using mysql database in place of mnesia(default of ejabberd).Everything is working fine,Now i am trying to some module for ODBC mod, like mod_muc to mod_muc_odbc, then i am getting error like,
=ERROR REPORT==== 2014-01-20 11:39:08 ===
C(<0.37.0>:gen_mod:75) : Problem starting the module mod_muc_odbc for host "localhost"
options: [{host,"conference.#HOST#"},
{access,muc},
{access_create,muc},
{access_persistent,muc},
{access_admin,muc_admin},
{max_users,500}]
error: undef
=ERROR REPORT==== 2014-01-20 11:39:08 ===
C(<0.37.0>:gen_mod:80) : ejabberd initialization was aborted because a module start failed.
How to fix it ? Another question related with ejabberd is that , Can i see the whole chat record in mysql database, if yes then how ?

Answer 1

I had a same problem. Just another module. This part of log:
{max_users,500}]
error: undef
means that you ejabbered was not compiled with that specific module support.
I am using gentoo linux so it was easy to me to add USE="mymodule" emerge -av ejabered and compile ejjabered with mymodule that was missing.
In your post I can not see what linux distro are you using? But you get a picture from my answer.