Disable the repo temporarily. Use the repos icon on the left. Alternatively you can wait a while and see if the repo becomes available. Then try your operation again. After that think about upgrading to Fedora 8 as the support for Fedora 6 is non-existent.
The Bassinator © ®
Laptop: Just a couple of old single core units
Desktop: BioStar MCP6PB M2+ / AMD Phenom 9750 Quad Core / 4GB / Kingston HyperX 3K SSD 240GB SATA 3.0 / 1TB SATA / EVGA GeForce 8400 GS 1GB