Tekkit crashes after loading any world, please help

[ThisMustBeHalo]

My tekkit loads normally, and shows the Mojang screen and everything, but as soon as I load a world, the screen shows "Saving Chunks", and after a few minutes, crashes without leaving an error report. It used to work fine with no bugs. I have reinstalled, cleared the cache, removed my texture pack, and tried offline mode, nothing works. I am running Windows XP with the highest memory settings that the Launcher will allow (1500-something MB). Thanks for your help.

[tekkithelper]

is it for every single world if not i can't help you

[ThisMustBeHalo]

Yes, it is.