Error on install

I got following error while installing the component

You don't have permission to access /main/administrator/components/com_mobilejoomla/scientia/index.php on this server.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.


It also gave me following message after installation

Mobile Joomla 1.2.3 is successfully installed!
Congratulations! You successfully installed Mobile Joomla!, the best way to mobilize your Joomla! site, displaying beautifully on iPhone, iPad, Android, Windows Phone and all other phones.


Does that mean my install was success or I need to reinstall that?

Most likely it means that MobileJoomla is installed, but MobileScientia plugin is not.

Yes I cant see MobileScientia in plugins. Is it an important part for the component?

No, it's optional. It's "competitor" of Mobile-AMDD plugin, so one of them should be enabled only. Mobile-AMDD is maintained by us, and Mobile-ScientiaMobile is based on quite famous ScientiaMobile library (former TeraWURFL).

Ah,
Thanks a lot.