We switched servers and in the process some PHP script code calling a mysql database got messed up. We had the same problem when we switched server a while back and it took that programmer about 15 minutes to fix it.
You must be experiences and know exactly what you are doing since it's an active website you will be working with.
No prepayments. GAF escrow OK!
You must have some reputation here and been a member for a while.
You get paid when everything works again. You will allow us to test everything 100% before you get paid.