CompuServe Messages

Don; I have a rather bazaar problem with the bridge board. After I set it up, everything seemed to work ok until the next day. Now I can not get into the color mode. Typing "MODE COL80" gets me an error message "Invalid parameter 'COL8'." I have tried putting it into a batch file and many other things. Tried booting from a copy of the MSDOS floppy and then finally from the original floppy with the same results. Attempted other mode commands such as "MODE LPT1:=COM1:" with similar results. I am suspicious of "setcpu keypatch," keymap and maybe "sidecarkeys.table" but don't know what to try next. CBM indicated to my dealer that they thought the BB itself was bad (I find that a bit had to believe since everything else that I have tried works fine). Any ideas as to what to try while waiting for my new 2500/03 to arrive?