Error trying to use oo for android

This is the Boonex app I downloaded off of the Android market. Put in my info for the site and got this error.

Exception: PI must not start with xml (position:unknown @2:5 in java.io.InputStreamReader@45fe0ae0)

Already removed spaces out of php files after ?>  in xmlrpc. Also cleared the cache. What else do I need to do?

Please can you provide site url to check the problem ?

If you open this page:
http://your-site.com/xmlrpc/

And view page source, you'll see empty line(s) before <?xml version="1.0"?> string, this is the problem, get rid of this empty lines(s) and it will work.

 Could anyone say which file we need to reduce the empty lines inside the xmlrpc folder

Thank you

It maybe different files, try to remember which files you edited before and check them, in most cases this is new lines(or just spaces) before the opening php tag '<?' in th beginning of file or after closing php tag '?>' at the end of file.