Codeigniter image manipulator Unable to save the image - php

Question

Well i have the following problem:
I'm using CodeIgniter 2.1.3 and want to upload an image and create two scaled images. one that is resized to the size of around 50x50 and one that is resized to around 200x200.
Uploading is doing fine.
But when i want to resize the following error occures:
Unable to save the image. Please make sure the image and file directory are writable.
I've set my permission on the server to 777, but it still doesn't compute
Here is the code of the classes:
public function uploadimage()
{
$head = array('title' => 'Upload Image');
$error = array('error' => '');
$this->load->view('head',$head);
$this->load->view('imageUpload', $error);
$this->load->view('footer');
}
public function changeimage()
{
$config = array();
$config['upload_path'] = 'img/Upload';
$config['allowed_types'] = 'gif|jpg|jpeg|png|bmp';
$config['max_size'] = '100';
$config['max_width'] = '200';
$config['max_height'] = '200';
$config['overwrite'] = TRUE;
$config['file_name'] = md5($this->session->userdata('username')).".png";
$head = array('title' => 'Upload Image');
$this->upload->initialize($config);
if ( ! $this->upload->do_upload())
{
$error = array('error' => $this->upload->display_errors());
$this->load->view('head',$head);
$this->load->view('imageUpload', $error);
$this->load->view('footer');
}
else
{
$uploaddata = $this->upload->data();
//Create Thumb
$config2 = array();
$config2['image_library'] = 'gd';
$config2['source_image'] = $uploaddata['full_path'];
$config2['maintain_ratio'] = TRUE;
$config2['width'] = 50;
$config2['height'] = 50;
$config2['new_image'] = '/~3612546/DateSite/img/ProfileThumbs/'.$uploaddata['file_name'];
$this->image_lib->initialize($config2);
if ( ! $this->image_lib->resize())
{
echo $this->image_lib->display_errors();
}
//Create resized original image so images < 200x200 get resized to get as close to 200x200
$config3 = array();
$config3['image_library'] = 'gd';
$config3['source_image'] =$uploaddata['full_path'];
$config3['maintain_ratio'] = TRUE;
$config3['width'] = 200;
$config3['height'] = 200;
$config3['new_image'] = '/~3612546/DateSite/img/ProfileImages/'.$uploaddata['file_name'];
$this->image_lib->initialize($config3);
if ( ! $this->image_lib->resize())
{
echo $uploaddata['full_path'];
echo $this->image_lib->display_errors();
}
}
}

Answer 1

i really don't think tilde is good for upload urls:
/~3612546/DateSite/img/ProfileImages/
then, all your urls are upper/lowercase, put them all to lowercase like this:
/~3612546/dateSite/img/profileimages/
in the end post what error do you receive now that you chmod 777 your upload folder, do you added 777 only to dir or dir+all his content? (it's important dir+all his content to 777)