Can't Connect with Random Config

[deathroll]

Hi there!

My ISP made some improvements. Now, my ISP is using randomly generated config filenames. I'm trying to connect with using TFTP enforce bypass and autoserving config file. My modem can't be operational with my recent config file. I encounter "Neg Or Bad Reg Rsp - Reinitialize MAC..." error. How can I connect again? Any help would be awesome.