Cannot acces local file

SUGGESTED

Hi, from Sage X3 v12 web, i use the editor ADOTRT. Open my src program and run. 

local char zfile(255), CURLINE(20)

zfile = "e:\temp\mb\test.txt"

openi zfile Using [TST]

Repeat

   Rdseq CURLINE Using [TST]

   infbox CURLINE

until fstat <> 0

openi using [TST]

infbox zfile

i receive this error: Problem with Access to File e:\temp\mb\test.txt.

Is a configuration missing?

Thanks