Unable to install the AIR on Samsung Galaxy Fit

Hi,

I am unable to install the Adobe Air on Samsung Galaxy Fit GT-S5670.

I have adroid Version 2.2.1.

Whenever i am trying to load an appilication from Adobe flex ver 4.5,I am getting error called

Error occurred while installing the application:

pkg: /data/local/tmp/Runtime.apk

Failure [INSTALL_FAILED_INVALID_APK]

1857 KB/s (6108444 bytes in 3.212s)

Command is given below

<?xml version="1.0" encoding="utf-8"?>

<s:ViewNavigatorApplication xmlns:fx="http://ns.adobe.com/mxml/2009"

xmlns:s="library://ns.adobe.com/flex/spark" firstView="views.saaHomeView">

<fx:Declarations>

<!-- Place non-visual elements (e.g., services, value objects) here -->

</fx:Declarations>

</s:ViewNavigatorApplication>

But the same is working on Samsung glaxy tab or HTC desire.

can any one please help me

thanks

Suren