"editing Shipping Method" Save Issue


I recently upgraded my site to CS-Cart-4.2.3. I am able to create custom shipping method. However, when i edit any value on the general tab or on shipping charges tab, whatever i enter, it doesn’t save. Instead of getting a message “Changes saved or whatever”, it just takes me back to Dashboard without any menu options available. Does anybody have an idea or have dealt with a similar issue? The same options are working fine on xampp on my laptop. The site is hosted on the server with freebsd 9.3, apache 2.4 and mysql 5.6.

I would really appreciate if some can help me.