How To Execute an Integration Services (SSIS) Package from a SQL Server Stored Procedure i am executing query like this on sql server 2008 R2  

DECLARE @returncode int
EXEC @returncode = xp_cmdshell 'dtexec /f "C:\certs\SSIS Disposition\SSIS Disposition\SSIS Disposition\Package1.dtsx"'


and getting error

Microsoft (R) SQL Server Execute Package Utility
Version 10.50.2500.0 for 64-bit
Copyright (C) Microsoft Corporation 2010. All rights reserved.
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Started:  12:08:21 AM
Error: 2014-03-21 00:08:21.71
   Code: 0xC0016016
   Source:  
   Description: Failed to decrypt protected XML node "DTS:Password" with error 0x8009000B "Key not valid for use in specified state.". You may not be authorized to access this information. This error occurs when there is a cryptographic error. Verify that
 the correct key is available.
End Error
Progress: 2014-03-21 00:08:22.66
   Source: Data Flow Task 1 
   Validating: 0% complete
End Progress
Progress: 2014-03-21 00:08:22.69
   Source: Data Flow Task 1 
   Validating: 50% complete
End Progress
Error: 2014-03-21 00:08:23.05
   Code: 0xC0202009
   Source: Package1 Connection manager "DestinationConnectionOLEDB"
   Description: SSIS Error Code DTS_E_OLEDBERROR.  An OLE DB error has occurred. Error code: 0x80040E4D.
An OLE DB record is available.  Source: "Microsoft SQL Server Native Client 10.0"  Hresult: 0x80040E4D  Description: "Login failed for user 'wm_bulk'.".
End Error
Error: 2014-03-21 00:08:23.07
   Code: 0xC020801C
   Source: Data Flow Task 1 Destination - ACQ_DailyFeedStaging [220]
   Description: SSIS Error Code DTS_E_CANNOTACQUIRECONNECTIONFROMCONNECTIONMANAGER.  The AcquireConnection method call to the connection manager "DestinationConnectionOLEDB" failed with error code 0xC0202009.  There may be error messages posted before thi
s with more information on why the AcquireConnection method call failed.
End Error
Error: 2014-03-21 00:08:23.07
   Code: 0xC0047017
   Source: Data Flow Task 1 SSIS.Pipeline
   Description: component "Destination - ACQ_DailyFeedStaging" (220) failed validation and returned error code 0xC020801C.
End Error
Progress: 2014-03-21 00:08:23.07
   Source: Data Flow Task 1 
   Validating: 100% complete
End Progress
Error: 2014-03-21 00:08:23.07
   Code: 0xC004700C
   Source: Data Flow Task 1 SSIS.Pipeline
   Description: One or more component failed validation.
End Error
Error: 2014-03-21 00:08:23.07
   Code: 0xC0024107
   Source: Data Flow Task 1 
   Description: There were errors during task validation.
End Error
DTExec: The package execution returned DTSER_FAILURE (1).
Started:  12:08:21 AM
Finished: 12:08:23 AM
Elapsed:  1.544 seconds
NULL
It looks as though the package has been saved with sensitive data protected, meaning that it can only be run by specified users. 

To fix it, set the PackageProtectionLevel to DontSaveSensitive and then re-deploy the package to the server.