JpGraph Error: 25128 The function imageantialias() is not available in your PHP installation. Use the GD version that comes with PHP and not the standalone version
To fix problem JpGraph Error: 25128, first you need to install php-gd package.
apt-get install php5-gd
for Debian like systems, or for RH like:
yum install php-gd
Then locate and edit file gd-image.inc.php. Comment (disable) line with JpGraphError::RaiseL(25128); In function SetAntiAliasing.