How to run Master Package Containing Multiple packages from SSMS Agent

Hi Experts,<o:p></o:p>

I have a MASTER package containing multiple packages using execute package task in SSIS.<o:p></o:p>

When am running  this MASTER Package in Sql server agent in SSMS, am getting error as below.<o:p></o:p>

Please provide steps how to run this and let me know what information am missing to run the Master package.

ERROR :

Failed to decrypt protected XML node “DTS: Password” with error 0x8009000B “Keynot valid for use in specified state”. You may not be authorized to access this information. This error occurs when there is cryptographic error. Verify that the correct key is available. 

<o:p>Am unable to attach the screenshot here. Please let me know what key i need and where i have to update.</o:p>

Thankyou and Regards,

Vijay.