For the next time I would suggest to post these NX questions in the NX design part of this forum, you probably get better response there than in this general "community Suggestions" part.
But have you installed just base version of NX 11.0? If so please download and install MP1, I know some issues in here have been solved with opening NX 10.0 parts in NX 11.0.
Hope this solves the issue.
sorry i too don't have any idea about the issue you are facing. To me it seems you require your webkey credentials to get access to all the download options.
Dennis will be able to guide you on this.
If you don't find any help soon ..please try to get in touch with GTAC. Toll free numbers specific to you location are there on the support site..