When I record load test for web portal, and I have big problem because I must login there to one page ,and go to next like this (…NextPagePortal/Default.aspx) GET /TEST_WEB/Slowniki/S...
Setting the "Cookie handling" option to "User real-time cookies" should solve cookie-related issues. In your case, it looks like there something else that causes the problem.
To be able to tell you more, I need to look into the recorded task and the execution results. Zip your entire project suite folder and send me the archive.