receive error codes when trying to upload pics

Warning: imagecreatefromjpeg() [function.imagecreatefromjpeg]: ‘/home/agilekni/public_html/wp-content/uploads/2007/06/p1000700.JPG’ is not a valid JPEG file in /home/agilekni/public_html/wp-admin/admin-functions.php on line 2153

Warning: imageantialias(): supplied argument is not a valid Image resource in /home/agilekni/public_html/wp-admin/admin-functions.php on line 2160

Warning: Cannot modify header information – headers already sent by (output started at /home/agilekni/public_html/wp-admin/admin-functions.php:2153) in /home/agilekni/public_html/wp-includes/pluggable.php on line 275