NamedCredentialCallOut

HTTPRequest feedRequest = new HTTP Request();
feedRequest.setEndpoint('callout:SalesforceNC/services/data/v32.0');
feedRequest.setMethod('GET');
HTTP http = new HTTP();
HTTPResponse feedResponse = http.send(feedRequest);
System.debug(feedResponse.getBody());

I am trying Named Credential with Password Authentication

HttpRequest req = new HttpRequest();
req.setEndpoint('callout:HTTP_Basic_Credential/services/data/v32.0');
req.setMethod('GET');
Http http = new Http();
HttpResponse res = http.send(req);
System.debug(res.getBody());

This code is giving me below error:

if Generate Authorization Header is checked
[{"message":"INVALID_HEADER_TYPE","errorCode":"INVALID_AUTH_HEADER"}]

if Generate Authorization Header is not checked,then it is giving session expired.