Could not load file or assembly 'Microsoft.Xrm.Sdk, Version=5.0.0. error while importing data from flatfile to crm using ssis package

Hi

i'm trying to import data from flatfile to crm2011 using ssis package.

my package worked fine on the local system but when i checked them into Team foundation server and trying to execute there was a message that your package has upgraded and when i run it the following error occured. can some one help me with this error.

i created the package in vs2012 which executed well and the TFS was in MS sqlserver data tools 2013.

Could not load file or assembly 'Microsoft.Xrm.Sdk, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.