Error when using RHttpSession with UIQ 3

Hi,

I'm trying to use RHttpSession with UIQ3. I issue:

_LIT8(KUrl, "http://www.yahoo.com");
iUriParser.Parse(KUrl);
iSession.OpenTransactionL(iUriParser, *this); // this class implements MHTTPTransactionCallback

I can see in Debug view after a time:

24.065 Constructing HCTL Bcsp
29.105 Thread SdpServer.EXE::Main Killed -5

And the callbacks MHFRunL or MHFRunError never get called. I have All -TCB capabilities.

Please, help what does this -5 mean (KErrNotSupported bu what's wrong?) and how to fix?

Thank you very much in advance!
Genesis