The asterisk Logs reports Realtime mapping for \'meetme\' found to engine \'odbc\', but the engine is not available
module show like odbc = 0 modules loaded
yum install unixODBC unixODBC-devel libtool-ltdl libtool-ltdl-devel
Once you have done that, be sure to re-run the Asterisk configure script. Then check menuselect and res_odbc should be available.