Hmm that seems strange
You google "firmware losi esc" it should come up with the correct firmware
Maybe you installed the incorrect firmware which corrupted it?
Heres the correct one you need
http://losi.com/Support/XcelorinDownloads.aspx
and then choose
Firmware for 1/10 Xcelorin Sensored ESC (LOSB9500) ONLY
Hope that helps