Error while posting with Segment

Hi,

I am trying to post an entry using t- code f-02.. and i am assigning a profit center to the line item. I have also assigned a segment to my profit center....

But while posting the document i am getting the following error..

<i><b>You do not have any authorization for segment ED and function 01

Message no. FAGL_POST_SERVICE022

Diagnosis

You do not have authorization to perform function 01 for segment AA. The record type is 0.

Procedure

Contact your system administrator. Add the missing authorizations for object F_FAGL_SEG.</b></i>

Please let me know what needs to be done to rectify the above error.

Thanks and regards,

Ankur