HIV seropositive men stratified based on CMV titer in semen at the Pre-Screen visit (30 days prior to entry). Patients with a CMV titer >= 5000 PFU/ml and a positive result upon qualitative urine CMV culture may be eligible for entry into the main group and patients with a CMV titer < 5000 PFU/ml may be eligible for entry into the satellite group. Patients will on 1263W94 for 4 weeks. Patients will be present for clinic visits on study days 1, 7, 14, 21, and 28. They will return to the clinic for post treatment evaluations on study days 42 and 56.