have someone a correct bsdl-file for the NS7520B?
Is the following one not working?
http://ftp1.digi.com/support/documentation/hwtoolkit_ns7520bsdl.zip
That file is not working. if a do a syntax check with the tool of JTAG Technologies I get a lot of warnings and errors.
Please contact Technical Support via phone or online support request so we can determine if the errors have to do with your environment or if something is corrupted in the file.