what image are you trying to load onto it?
the followuing are some quick lookups i did and the format is feature set, Min Ram, Min Flash in MB
ENTERPRISE BASIC, 64, 16
IP, 32, 8
IP/FW/IDS, 32, 16
so depending on what image you selected maybe you don't have the required ram and it is not loading the image but instead you are coming up in rommon ?
but your config should be stored in the nvram not the flash so if it is not taking the config do as stated above and verify your config register settings and make sure you are not skipping the nvram on bootup.