Error during Package building error Failed to decrypt protected XML node

Hi

Error loading HttpRequest.dtsx: Failed to decrypt protected XML node "DTS:Property" 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.      C:\foldername\PkgPacketFormulation\Integration Services Project1\Integration Services Project1\HttpRequest.dtsx    1    1  

  Unexpected build error: Access to the path 'C:\foldername\PkgPacketFormulation\Integration Services Project1\Integration Services Project1\bin\Deployment\CallBackSchedule.dtsx' is denied..  Make sure that the product is installed properly.       0    0    

Kindly help me

With Regards

BI_Group