resource cost does not appear custom value

Hi All

i new to projeqtor and try to install and play around, i have a question, hope some one manage to assist solve my issue.

OS: centos 7.2
projeqtor : v5.5.4

i manage to create custom function text/value (menu > parameters > Lists of values > functions) refer to snapshot01.png but the custom function text/value does not appear in add resource cost tab (refer to snap04.png)

any idea or solution for this ( let custom function text/value appear in add resource cost tab).
thanks in advance

the action taken as below: (final solve by reboot notebook (projeqtor hosted in virtualbox (demo and learning))
browser : firefox, chrome with latest update.
all test login as admin.

1. logout and clear the browser cache. ( same issue)
2. restart apacher service and login from browser (same issue)
3. reboot the centos server (virtualbox) (same issue)
3. power off centos (virtualbox) , reboot the notebook, power on the centos server (virtualbox), login from browser (record appear - issue solve)

thanks for the reply

today 21/11/2016 i try install projeqtor v6.0.0, and also create custom function, but with projeqtor v6.0.0, i manage get the new custom value in resource cost tab by disconnection (logout) and login .
thanks for babynus helping .

how to mark this quest as solve and closed the question? kindly advise