Selecting text in a canvas

[ulis]

I wrote this code:

canvas .c -height 20 -width 100 -selectborderwidth 0
.c create text 2 2 -anchor nw -text myText
.c select from 1 2; .c select to 1 4
pack .c

and get the last char of the selected text without the selectbackground color (in white on gray).

What goes wrong ?

Thanx

ulis