Can not edit any blog entry

Hi all.
I have searched for a solution to this isssue for some time now but can't find any way to edit my own blog entry or any blog entry. I am the administrator of the website and i have all permission.
I can create or delete a blog entry but can not edit them.
Please let me know if you have any info or solution, really don't know what to do about it.
I have reinstalled permissions, i have reinstalled the modules but still not working.

thanks a lot.
Nadia