iOS Question XML in http

Hi All

I am facing an issue with an http call that has an XML parameter. The call works perfectly ok with B4A, but not with B4I

Unfortunately, I can't post the call in here, but even if I try something like this,

I get the same results
"ResponseError: unsupported URL, status code: 0"

I tried using EscapeXml code provided in this link. :
https://www.b4x.com/android/forum/threads/escapexml-code-snippet.35720/
The job returns successful but unfortunately the host returns error ( unable to parse the request)

I was wondering, what is the actual difference between the B4A call and the B4I.
I am using the http libraries provided in here
https://www.b4x.com/android/forum/threads/b4x-okhttputils2-ihttputils2-httputils2-source-code.82632/

Any help is greatly appreciated.

Thanks
iCAB