Hiya,
I have 15+ years experience with Linux systems admin & PHP coding, and therefore I am confident I can find a resolution to this for you.
My bid price gets you up to (roughly) 3 hours of my time to spend on diagnosing and addressing this issue.
I can start within the next few days, and probably get it resolved within 24 hours. I state a longer time frame to give you some time to be sure it's resolved to your satisfaction and allow a second round of improvements if needed later on.
Yours,
Kev Green,
oRe Net.