how-to obtain attachment data via OSLC

I'm trying to write a utility to fix-up work items after a export->import migration from one RTC system to another. But when I process attachments I am unable to obtain the actual attachment data (re: <rtc_cm> ) via the obtained rdf:resource reference.

When I do a get on the rdf:resource URI instead of the content data, I get HTML with the text:
"You have followed a direct link to content hosted in a Jazz server. This page has been presented to ensure that a malicious website cannot use cleverly crafted content to circumvent security. If you would like to access the content, please use the link below."

Anyone know what I maybe doing wrong or a way around the injected HTML?

public String getAttachmentDataByReference( TeamConcertRepository repo, WorkItemAttachment wia )

    {

        StringBuffer data = new StringBuffer( ">>>no data retreived<<<" );

        String dataReference = wia.getContentReference();

        GetMethod method = new GetMethod( dataReference );

        method.addRequestHeader( "Accept", wia.getFormat() );

        method.addRequestHeader( "Content-type", wia.getFormat() );

        method.setFollowRedirects( true );

        int statusCode;

        try

        {

            statusCode = repo.getClient().executeMethod( method );

            System.err.println( "status from get is[" + statusCode + "]" );

            InputStream stream = method.getResponseBodyAsStream();

            .

            .

            .

Thanks in advance!