In some cases, the Network versions of AutoCAD Release 14 and 2000 may be unable 
to connect to the AdLM License Server.  This will cause a fatal error when 
attempting to start AutoCAD and no "hit" will be recorded in the adlm.log file.  
This problem only occurs when using TCP/IP protocol for AdLM and does not occur 
on every installation.

Autodesk has developed a special version of the adesksys.dll file that will 
resolve this problem when it is used to replace the file that ships with 
AutoCAD.  The updated adesksys.dll and instructions on how to apply it may be 
downloaded at <link>.  This file should only be used on Windows 2000 
workstations where the TCP/IP Network Version of AutoCAD Release 14 or 2000 is 
being used.  It is important that this file not be used if you are using the IPX 
(NetWare) version of AdLM.

This document explains the usage of the special adesksys.dll file for use with 
the TCP/IP network versions of AutoCAD 14.01 and 2000 running on Windows 2000.  
This version of adesksys.dll should not be used with any other operating system 
or if you are using the IPX protocol for license management with AutoCAD.  The 
original release of AutoCAD 14 (14.0) does not use adesksys.dll.

Locate the adesksys.dll file in your AutoCAD executable directory.  Examine the 
adesksys.dll file properties and verify that the file size is 90112 bytes, if it 
is any other size do not proceed.  Once the adesksys.dll file has been located 
and the file size verified, replace the file with the updated adesksys.dll of 
the same size.  Examining the file properties and verifying a creation date of 
02/15/2000 will identify the new adesksys.dll.  You may find other copies of 
adesksys.dll on your system; they need not be replaced.  If you have variant 
installs of AutoCAD on your system, replace all adesksys.dll files in every 
executable directory.