MsSQL Web Editör - Database or/and Table modify

[Oguz]

Hello,

I am Turk, and I not speak good english language, sorry.

I use;
Plesk : 12.5.30 Update #25
OS : ‪Microsoft Windows Server 2008 R2 Service Pack 1‬
MsSQL Web Editör : ASP.Net Enterprise Manager

I want table name or table of contents modify. Table click and returns error.
http://i.imgur.com/hGV1C1Z.png

Or MsSQL Web Editör : myLittleAdmin

I can't click Delete, Rename and Modify
http://i.imgur.com/Lraw9HS.png

Why? Is there anyone who can help me?