Air Application URL Path Issue

I am trying to invoke a content of the file which is in shared folder from Air application.
Version : Flash builder 4.5,Flex3.6 sdk and Air 2.7.
for this am using the below code..
var request:URLRequest = new URLRequest();
//request.url = ('file:///c:/params.txt'); - This is working fine
request.url = ('file:///172.20.188.25/Share/chk/Property/params.txt'); // its not working
trace("Unable to load URL: " + request);
var variables:URLLoader = new URLLoader();
variables.dataFormat = URLLoaderDataFormat.VARIABLES;
variables.addEventListener(Event.COMPLETE, completeHandler);
try
variables.load(request);
The same part of code ,I tried in Flex application is working .but in Air application its not working.
Its urgent requirement,If any one know the way to resolve this path issues.
Kindly let us know.
Thanks in Advance !!

I tried in the following URL but no use ..
its throwing ioError and textError and stream error.
1.file:///172.20.188.25/Share/chk/Property/params.txt
2.http://172.20.188.25/Share/chk/Property/params.txt
3. //172.20.188.25/Share/chk/Property/params.txt
Is there any other solution for this issue ?

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With Regards
Gopinath.A
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First Internet Systems Pvt. Ltd.,
Chennai

try this
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regards
Leonardo França
Adobe Certified Expert Flex 3 with AIR
Adobe Certified Expert Rich Internet Application Specialist v1.0
Adobe Certified Expert Flash CS3 Professional
Certified Professional Adobe Flex 2 Developer
Adobe Certified Professional Flash MX 2004 Developer
http://www.leonardofranca.com
http://twitter/leofederal
Manager AUGDF - Adobe User Group do Distrito Federal
http://www.augdf.com.br
http://twitter/augdf

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