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: Toshiba Satellite / Intel Core 2 Duo 1.73 GHz / 2GB / 160GB / Intel Mobile 945GM/GMS/GME/943/940GML Integrated Graphics
Desktop: BioStar MCP6PB M2+ / AMD Phenom 9750 Quad Core / 4GB / 1TB SATA / 500GB SATA / EVGA GeForce 8400 GS 1GB