Java Application Urgent Update

Recently upgraded to JDK 1.5, tomcat 5 on our server. Require a java programmer to modify our current web application to conform to the incompatibilities that have arisen during the upgrade. You will Update the Java based web application that was already coded using Tomcat 4 and JDK 1.4. The server its been running on has been upgraded and the original programmer is incommunicado. Because of this, the old application needs to run on an up to date Apace server. This has caused several critical errors in the application. Knowledge of Java programming, Linux, and server administration is required. This project is of urgent nature, and must be done immediately. It seems the main problem is interaction with updating the mysql database. We've gotten some parts to work, like login. The application is a backend for an employment office, listing resumes, contact information, and companies. The errors occur when attempting to update or edit a record.