Admin login problem to phpnuke

I've a phpnuke site and I've a problem about login to admin section. I can login to site successfully but when I click to admin link another login form is coming and I could not pass it. I need someone to fix this problem. PS: I've another idea. If you find a way to show one of admins as logined to [login to view URL] in php codes (I've no idea how it's possible) I think arrange password protection on apache settings. Please provide your solution or idea in your bid, I'll chose coder by approach to problem. To be sure "you read all of my description", please add word atlantis to your bid. I'll provide site address and necessary information to winner coder. System: PHPNuke 7.6 / Linux hosting with cpanel. Thanks.