Redirect to stream URL not working

Dear All,

XiiaLIve Pro 3.3.0.3 returns a "Not found E:-54" error when connecting to URL which is a script returning one of two different valid RTSP stream depending on the time in the day. Here are the headers:

GET http://xxx.xxx/radio HTTP/1.1
Host: xxx.xxx
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive
 
HTTP/1.1 302 Found
Date: Sun, 22 Mar 2015 15:10:45 GMT
Server: Apache
Location: rtsp://rtsp.xxx.xxx/xxx.aac
Content-Length: 0
Keep-Alive: timeout=15, max=100
Connection: Keep-Alive
Content-Type: text/html

When launched in any web browser the script returns a valid RTSP url (it uses a conditional header() command in PHP) that works perfectly when launched in my XiaaLive Pro. However, when I put the url of the script itself in Favourites it returns an error (tested on different Android OS versions and several different phones).

Could you please let me know why this occurs?

Best wishes,

Adam