Arabic words aren't displayed properly in DrRacket

Question

I work on Arabic scripted texts in DrRacket but the characters stand seprate, they have to be attached to each other.
The second problem is that DrRacket reads them left-to-right like in Latin script. When I am posting here in order to show how they look in DrRacket; they get conjoined and its order gets reversed (which is good since Arabic script is written right-to-left).

(explode "اعمالنده")

(list "اعمالنده" "اولا") (list "آبار — آوار كلمه+سنه نظر بیوریله")

This is how it looks in DrRacket1

Why do the chars stand separately and why aren't the order of the chars as they should be from right-to left?