script / database troubleshooting and repair

I have a script that gets errors when I try to email users from it. It also doesnt send user varification mail and people cant sign up? I had to turn on register_globals via htaccess to get the script to work at all, There are a few errors from my error log attached I need to know if this is the script or the server. And if possable I need it repaired. I do not have root access to this server as I only rent space and only have a reseller account with cPanel This shouldnt be too hard to figure out for a pro, so please dont bid a price that is out of this world... If you cant complete the project, dont expect to get paid ;-) I need this done asap, and payment will be as soon as the project is completed