Exchange Systems Manager - Access is Denied ID no: c0070005

Hi Everyone

I have a problem trying to launch Exchange System Manager. When I try to launch ESM I get a small window as below:

Exchange System Manager
Access is denied
Facility: Win32
ID no: c0070005
Exchange System Manager

A few seconds later I get another error window:

W:mmc.exe - Application Error
The instruction at "0x77f5d61b" referenced memory at "0x00000010 ". The memory could not be "written ".
Click on OK to terminate the program
Click on CANCEL to debeg the program

I as well can't right click on users in ADUC and select properties. I get another error window:

Microsoft Active Directory - Exchange Extension
Access is Denied
Facility: Win32
ID no:c0070005
Microsoft Active Directory - Exchange Extension

I as well can't access anything but Security in Event Viewer. When I try to click on say Application an error window comes up:

Event Viewer
Unable to complete the operation on "Application ".
Access is denied.

The server and services seem to work okay. It just seemed to occur out of nowhere.

Please help. Thanks in advance.

 

this may help
http://support.microsoft.com/default.aspx/kb/323915