Print from AIR for Android Application

Hi!

After I have read a lot about Printbot, Print 2 Page, Google Could Print...
I think the best solution is open the file with application by default. So, the user can decide what application use to print the document.
I tried to use openWithDefaultApplication function of the File class, but this don´t worked over my Samsung Galaxy Tab 7". Although, it work ok over the emulator.

This is my code:

            public var file:File = null
            public function print():void
            {
                file = File.documentsDirectory.resolvePath(appTest\\xml_arts\\html\\art_10383883.htm");
                if (file.exists)
                {
                    try{   
                        file.openWithDefaultApplication();
                    }
                    catch(e:Error)
                    {
                        trace("Hubo un error");
                    }
                }
            }

I try to copy the file to temporary file, and use this to call, but i get the same error.

                try{   
                    var tempFile:File;
                    file.copyTo(tempFile);
                    tempFile.openWithDefaultApplication();
                }
                catch(e:Error)
                {
                    trace("Hubo un error");
                }

I have these permission in the application's manifest:

            <manifest android:installLocation="auto">
                <!--See the Adobe AIR documentation for more information about setting Google Android permissions-->
                <!--Removing the permission android.permission.INTERNET will have the side effect
        of preventing you from debugging your application on your device-->
                <uses-permission android:name="android.permission.INTERNET"/>
                <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
                <uses-permission android:name="android.permission.READ_PHONE_STATE"/>
                <!--<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>-->
                <!--The DISABLE_KEYGUARD and WAKE_LOCK permissions should be toggled together
        in order to access AIR's SystemIdleMode APIs-->
                <!--uses-permission android:name="android.permission.DISABLE_KEYGUARD"/-->
                <uses-permission android:name="android.permission.WAKE_LOCK"/>
                <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS"/>
                <!--<uses-permission android:name="android.permission.CAMERA"/>-->
                <!--<uses-permission android:name="android.permission.RECORD_AUDIO"/>-->
                <!--The ACCESS_NETWORK_STATE and ACCESS_WIFI_STATE permissions should be toggled
        together in order to use AIR's NetworkInfo APIs-->
                <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
                <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
            </manifest>

Can anyone tell me where is the problem? Or any workaround?

Thanks!!