Login Acess has been Denied.

Hi i am having troubled login through elgg. And also both registering... Everytime i login this message has been displayed "The requested action (login) was not defined in the system." Similarly for Register "The requested action (Register) was not defined in the system."....

I checked mod_rewrite is working. Basically, my site is in a subfolder and I also sets path in .htaccess
file. I also sets path in elggdatalists table.

Do Help me out...