Getting Error While Uploading Clause Document in SAP Sourcing 9.0

Hi,

--------------------system description--------------

SAP Sourcing 9.0

SAP NW7.31 AS JAVA

IBM DB2 9.7

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I am getting error while executing clause document.

----------------------Error Description---------------

Login with buyer link into the system-> it has all authorizations

then Goto -> Contract Management -> Clause Library -> Clause list -> Click on New button -> Click on Add button -> Browse Document

it is showing POPUP with Error that "There is a problem with the Contract Generation web service Contact your system administrator"

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Thanks and Regards,

Murtaza Najmi