Multidomains cookies are blocked


Yesterday i have installed the plugin multidomains and added new domains to it.
Then i added subdomains to the new domains. That al worked great, till i wanted to login to those newly made subdomains. I get cookies are blocked from your browser, please check if there on. I have checked and they are on. I also tried multiple browsers and multiple computers. Non of that works, do you guys have a solution to this problem?