Admin login problems

[rsailors]

Hello every time I log in as myself an (admin) I can see the menu for admin but when I select it I am asked to login. Then when I do it goes right back to the photopost index page.

[rsailors]

Here is another error!

Warning: opendir(/path/to/your/photopost/data/): failed to open dir: No such file or directory in /home/virtual/site10/fst/var/www/html/photopost/adm-main.php on line 19

Warning: readdir(): supplied argument is not a valid Directory resource in /home/virtual/site10/fst/var/www/html/photopost/adm-main.php on line 21

Warning: closedir(): supplied argument is not a valid Directory resource in /home/virtual/site10/fst/var/www/html/photopost/adm-main.php on line 29