 This Phase I study is designed to evaluate the safety of AdvIL-12 gene therapy with an intent to offer a potential therapeutic advantage. The potential risks associated with the use of gene therapy in this group would appear reasonable in so far as evaluations will be frequent and progression should it occur will be found early and allow rapid movement of the patient to other possible therapies. Effectiveness will be monitored by serum PSA, transrectal ultrasound of the prostate, prostate biopsy and comparison of survival times to historical survival times for patients with radiation recurrent prostate tumors. Additional research laboratory analyses will be performed to evaluate the immune response engendered by this gene therapy protocol. This will consist of analysis of serum andor plasma and urine for systemic cytokine production using standard ELISA methodologies that we have performed in previous studies. In addition we will collect whole blood for the analysis of T cells by flow cytometry. We have established protocols for this analysis that can detect total CD4 and CD8 cells as well as those that express markers of activation such as HLADR. 