Smack and Strophe

please excuse my bad English …
does anyone know if there are communication problems between a chat created with SMACK and a web application that uses Strophe for the http-bind?
Summarize the situation:
I am developing an application on Android with asmack, no problem on connecting, sending chat message and presence and no reception problem through Strophe on the web site.

When from the website, through Strophe, I try to send a response to the mobile device does not pick them up.

It would seem an errror in the parse of the xml but I can not understand.

thank you very much for any suggestions, regards