Column Header in the Spreadsheet

I just bought your bbp professional package along with your tts add on. While in my bbp .voc list, I tried to add a column so I can add my contact’s last name. It would not let add the column even when i went into edit > add column

what is the error message?

I get the “NO SPACE IS ALLOWED IN COLUMN HEADER”error message after I get a pop up box that asks me to name the column.

The space in column header name is not allowed. For example, name the column header as LastName instead of Last Name, ie Last (space) Name.