Widget digsig tests problem

Hi,

I'm just about to embark on running the Widgets-Digsig conformance tests[1], however a GET on each test package returns text rather than a widget, e.g. [2].

Thanks,

-S

[1] http://dev.w3.org/2006/waf/widgets-digsig/imp-report/
[2] http://dev.w3.org/2006/waf/widgets-digsig/test-suite/test-cases/ta-validation/bad_signature/bad_signature.wgt