Images don't upload properly and error massage shown

Hi Dear

Images in both post-side or in media upload-side don’t upload properly. Few massages shown.

Warning: imagecreatetruecolor() [function.imagecreatetruecolor]: Invalid image dimensions in /home/specialr/public_html/all2buy.net/wp-includes/media.php on line 1985

Warning: imagecopyresampled() expects parameter 1 to be resource, boolean given in /home/specialr/public_html/all2buy.net/wp-includes/class-wp-image-editor-gd.php on line 180
3841

Above massage is shown during upload in new-media upload-end And big images crop instantly. So, images can not use as featured image. But images upload properly using other themes.

My Site is http://all2buy.net