OpenWithDefaultApplication in flex sdk 3.5.0.12683 and ReferenceError: Error #1069:

I am trying to use openWithDefaultApplication to open the files in default application for the desktop application developed using AIR.
Development environment is as follows
- Flex builder 3.0 eclipse plugin .
- Flex SDK version is 3.5.0.12683.
- AIR 2.0 sdk, I have used instruction specified at http://www.adobe.com/support/documentation/en/air/2/releasenotes_developers.html#h, to overlay AIR2.0 sdk with Flex 3.5.0.12683. SDK.
I get the following error when openWithDefaultApplication is executed
ReferenceError: Error #1069: Property openWithDefaultApplication not found on flash.filesystem.File and there is no default value.
at air_openwithdefaultapp/onFileSelect()[D:\www\flexprojects\air_openwithdefaultapp\src\air_ openwithdefaultapp.mxml:28]
I tried to trace/alert the flex and air runtime verions and I get following details, 3.5.0.12683 for Flex SDK and 2.5.0.16600 for AIR.
The same code works fine when I use the Flash Builder4 with Flex 3.5 sdk.
Any idea what is going wrong here?

Hi Swapnil,
1)Try Overlaying SDK to 2.0 like:
                 a)Download the AIR SDK 2.0 zip
                 b)and paste it at C:\Program Files\Adobe\Flex Builder 3\sdks\3.2.0 and
                 c)extract it.Check whether this SDK selected in Flex Compiler.
2) Make sure that you have changed the AIR version number in descripter file (-app.xml) for example <application xmlns="http://ns.adobe.com/air/application/1.5"> here have to change 1.5 to 2.0.
3) In the Flex Compiler panel check that which Flex SDK (3.5) has been selected. Might it different from defaultly selected.
In Flex Builder you can check in two ways :
          a)Window>Preferences>Flex>Installed SDKs(Default)>Check SDK selected.
          b)Select Project folder in Navigator Panel and Mouse Right click >properties>Flex Compiler>Check SDK selected.
4)Make sure that the opening files have accessibility with this function.
-Vamshi

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OpenWithDefaultApplication in flex sdk 3.5.0.12683 and ReferenceError: Error #1069:

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