Add a new Contract Line to an existing Contract using SOAP web service

Summary:

I'd like to add a new contract line to an existing Contract using SOAP web service

Content (required):

I'm using mergeContract to create a new contract line but I'm getting errors. Please help!

Version (include the version you are using, if applicable):

23A

Code Snippet (add any code snippets that support your topic, if applicable):

<soapenv:Header/>

    <soapenv:Body>

        <typ:mergeContract>

            <typ:contractHeader>

                <con:Id>300000257967465</con:Id>

                <con:MajorVersion>1</con:MajorVersion>

                <con:Cognomen>Test SOAP WT Contract 002aa</con:Cognomen>

                <con:ContractLine>

                    <con:LineNumber>2</con:LineNumber>

                    <con:LineTypeId>300000000099381</con:LineTypeId>

                    <con:LineTypeName>Free-form, project</con:LineTypeName>

                    <con:ItemName>Line number 2</con:ItemName>