CI the string you created "%38%33%34%35%31%31%44%39" is incorrect. This is the hex for the ascii string rather the the byte values.

You should be able to create the string and paste it into another program using the ALT key method, unless some character set conversion issue kills it.

Let's see if this works for you. Paste this into a excel spread sheet cell, and then paste out the displayed contents into your terminal program.

=CONCATENATE(CHAR(131),CHAR(69),CHAR(17),CHAR(217))