camera slideshow – Not Acceptable & 404 error when inserting from media library

recently, I setup the latest wordpress 3.4 site using softaculous ( same with fantastico ) and i used the camera project slideshow plug-in from pixedelic and the demo is awesome…

but when when i uploaded the pictures and insert the image from
media library , i got this error:

Not Acceptable
An appropriate representation of the requested resource ../wp-admin/media-upload.php could not be found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

and when i viewed the page, i got this error…

…/wp-content/plugins/camera-slideshow/lib/camera_functions.php on line 471

i have checked some of the related problems in the forum like one below:

https://www.ads-software.com/support/topic/stwp-adminmedia-uploadphp-could-not-be-found-on-this-server#post-1023616

and found this related one:

https://www.ads-software.com/support/topic/media-library-wont-upload-images?replies=16

but and some of problems on the forum were not resolved…so this could help somebody with the same error…

if your site is hosted in an internet provider pls contact your
the technical support of your hosting provider…where your site is
hosted…then asked them to make changes on the mod_security to allow the url on your wordpress folder site ( wp-content ), you dont have to do anything because the hosting provider only have access on it…they usually know what to do.

or if the tech support is not available or if your site is hosted on a hosting provider that does not offer FREE tech support… then check the permission of your “wp-content/uploads” folder..

the “uploads” folder should be set to “777” permission and its subfolders but be careful in doing this on your own, my advise is you should coordinate with your hosting provider to do it for you.
if you are finished uploading the images/pictures the picture files can be set to “644” permissions.

if you guys have other suggestions or violent reactions pls free to contradict… ??

thanks!