Unknown path to /sdcard? HELP!

A

AC Question

Hey guys! I had recently installed an Android 4.5 rom on my Samsung Galaxy S i9000, but I didn't really like it, so I went back to clockwork mode and restored the backup (which I am pretty sure I had saved prior to installing the rom). What happened then was that I couldn't power on my device. It literally gets stuck on the Samsung Galaxy I9000 startup screen. I can however access download mode and I can access clockword mode recovery. BUT, when I try to install another update with clockword mode recovery or trying anything on cwmr for that matter (factory reset, cache reset, anything...), I get the error message: Unknown path to /sdcard and I am stuck at this. Can anyone tell me how to fix this issue? Please, I need help quickly!