Dear hyper,
Please find the following lines in "\phpuploader\include_phpuploader.php":
$this->Name="AjaxUploaderFiles";
$cd=dirname($this->GetWebPath(__FILE__));
$this->ResourceDirectory="$cd/resources";
$this->ResourceHandler="$cd/ajaxuploaderresource.php";
$this->UploadUrl="$cd/ajaxuploaderhandler.php";
Please set the value of $cd to the actual value of your host, you can hard coded it.
After done, please try it again.
Keep me posted.
Thank you for asking