I was trying to upload a new picture of my car to my VbGarage and get the following error as soon as I hit submit. This comes up immediately on a new page. Any ideas?

Warning: fread() [function.fread]: Length parameter must be greater than 0 in [path]/vbgarage.php on line 156

Warning: Cannot modify header information - headers already sent by (output started at [path]/includes/class_core.php:3243) in [path]/vbgarage.php on line 217