How to extend Catalog Contract

Hi SAP Gurus,

I'm getting an error message during catalog shopping cart. After picking up the items from Catalog, items routed back to shopping cart with error message  "You cannot add the catalog items to shopping cart. Contract with this catalog expired by 31/12/2014"

How can I change and where to change the  contract expiration date in sap srm (We are on SRM 7.01 version)

Thanks in advance