Solved.
Adding this lines on /etc/apache2/mod_jk.conf :
# Fix para Flex2gateway
<IfModule jk_module>
JkMount /*.cfm ajp13
JkMount /*.cfc ajp13
JkMount /*.do ajp13
JkMount /*.jsp ajp13
JkMount /*.cfchart ajp13
JkMount /*.cfres ajp13
JkMount /*.cfm/* ajp13
JkMount /*.cfml/* ajp13
JkMountCopy all
</IfModule>