Need an Asp programmer for long term support

We need an English speaking Asp programmer to help us improving an existing online classified system. We already bought an ASP+My SQL 5.0 classified system, and have used it for 2.5 years, the program itself works fine, and the source is open, there is an online community discussing and supporting it constantly. We need a partime programmer to help us doing some improvement and customised small developement from time to time, because some customised work are confidential, and for security reason, we do not want it to be discuss in that public online forum Currently we need a programmer to develop a user rating system for this classified system. Prefer a programmer with good command of ASP3.0, My SQL, Access database. No specific leadtime requirement, each small amendment may need from half day to 3 weeks to do it, and programmer can give quotation on case by case basis