=HINT #1= BLOCKS ARE NOT SCALED CORRECTLY
You can determine if the block does not work properly when using the INS (insert) command. After selecting the block, the dialog box has values in the lower right hand corner other than 1 or 0. Typically the values are set to 0.08.
If that occurs, then set these system valuables to the following values by typing in the upper case command listed below in the command window and then entering the values after the equal sign.
INSUNITS = 0
You may or may not have to repeat entering these values depending on how other variables were set by other users.