What do you mean by "the browser (...) won't accept my password and user name"? Don't you rather think that's an issue with the server not accepting it? Do you get a reply from the server saying it was rejected or is the problem that the form is not even sent?

You could maybe try switching off Javascript in the browser's options. With opera on the 770 I often had the problem that some malfunctioning Javascript (which was to blame on Opera) was blocking a form to be submitted.