Cydia Error On iPhone 2G Firmwire 3.1.3... Help Please?

My iPhone 2G 3.1.3 Jailbroken has an error... Whenever I try to load Cydia it says Data Loading and it stays like that for a while.... What do I do? I had an error recently and all my **** is gone... like SBSettings or Categories.. Its gone so I need to redownload it.. So is Appsync so alot of my apps are not downloading... Please help I have no idea what to do! Thanks allot :D