484941 Jquery PHP Script

Need someone who is good in jquery, and php. I have a script that used to work, that will download a video, convert it and put it in my database, and it goes down the list that aren't already converted, one after another. But now it's giving 504 gateway errors on everyone at 10min exactly, need it rewrote, or fixed. I didn't mark urgent, but first good bid and message i get i will select if YOU CAN START NOW! Need this solved. MSN messenger, or skype. Thanks!