[mbstring is needed] flexicontent doesn't work on new server

i'm using:

Joomla 2.5.14
Flexicontent 2.1.0 r1776
Php version 5.3.3

it was working, but when i moved the site to one with Php version Php 5.4.17, flexicontent no longer work.

i see the following screen:
stage.mediagenesis.info/bachelor-courses

the new server meets the following requirements:
www.flexicontent.org/documentati ... tions.html

Hello

before looking into this, please update to:
(install package, without uninstalling !)

v2.1.0 r1781
or
v2.1.1 r1789
code.google.com/p/flexicontent/downloads/list

after that please be specific, "doesn't work" does not give much information

thanks for the quick reply.

i tried to update to version: v2.1.0 r1781 and i received the following error:

"There was an error uploading this file to the server."

i didn't know how to describe the error, cos the menu item (flexicontent category) just didn't display.

this is the working (original) site (php 5.3):
stage.smf.edu.sg/bachelor-courses

this is the result on the new server (php 5.4):
stage.mediagenesis.info/bachelor-courses

Hello

-- your tmp (and logs) folders are probably wrong in the new server
... that is why the uploading of the new FLEXIcontent package fails
... please find tmp (and logs) folder in Joomla's Global settings, and correct them


ALSO: about frontend error
-- since the output is stopped at that point
i guess there is a PHP fatal error

please
- go to Joomla's Global configuration
- under TAB server find parameter "Error reporting", change this to "simple"

then visit the frontend and the error should appear

Regards

i've updated to the latest version.

and set "error reporting" to simple.

now i see the following error:

Fatal error: Call to undefined function mb_strtoupper() in /home/mediagen/public_html/stage/components/com_flexicontent/tmpl_common/category_alpha.php on line 187

url:
stage.mediagenesis.info/bachelor-courses

Hello

your new server lacks support for 'mbstring' PHP library,

please contact your webhosting, and ask them to load this

'mbstring' PHP library is used by FLEXIcontent for handling UTF8 strings (unicode language strings)

Regards