Getting permission error in portal.

Hi all,

In our company we have internal portal for all employees from different location ie.

http://<host><fully qualified domain name>:<port>/irj/portal

Now when i log in to this portal ,and i am given access to one of the folder in KM, and so i can view the list of document in this folder but when click on Document nothing is displayed and I get an error

<b>" Permission denied: uri=/documents/Knowledge_Repository/Repositories/Order To Cash/Recruitment, permission=node_list_children, user=27****"</b>

Is this the problem related with the permission ,I have read right with me.

Please suggest me cause of this error.

Its very Urgent Thanks in advance

Points will be alloted for any help

Thanks

Vinit