Since this came up as the autocomplete in Google, clearly everybody has this problem and re-googling should always succeed.
That having been said, following the prescribed procedure for entering block attributes, my attributes weren't showing up as properties of the block. Tried the command for the Enhanced Attribute Editor (EATTEDIT), but selecting my block got back the message "Block has no editable attributes". The solution, suggested in the message board thread below, was to use the ATTSYNC command on the block!
http://forums.augi.com/archive/index.php/t-71752.html
