Image Upload Script Error

I need an expert developer to fix the current bug in the image upload, We had two admin independent of each other recently. The current bug left behind was discovered recently and need to be resolved. The developer need to investigate why the image upload does not work and resolve this issue. Advance knowledge of MySQL, CSS, Java Script, PHP skills is needed. To apply you must give evidence for all the essential and nice-to-have skills and experience you have. The developer should set out the hourly rate within the proposed fixed price. No time waster please. The clarification about the project will be given today.