If this does not clear up the problem then the issue may be with the session starting and not be able to write the session cookies. If this is the case there may be an issue with your session save path info for you PHP. If you have access to this you should check the php.ini file for this setting and make sure it is set correctly. If you do not have access to this or do not know how to update it you should speak with your host about this.
Neither one of these solutions corrected the problem. Please Help