Couldn't compile ns,help!

["HUANG PENG" <huangpeng_buaa@a-1.net.cn>]

Hi, everyone:
 I have download the relevant files for compiling
ns(tcl8.0.4, tk8.0.4, tclcl, otcl,etc., each compiled smoothly
under Windows98).
 when I prepared to compile the ns project using VC++ 6.0
 ( the preparation work includes:
 1.compiled each of the necessary project mentioned above first.
 2.changed the name of makefile.vc to makefile.mak.
 3.opened the makefile.mak in VC++ 6.0.
 4.modified the relevant path informations in the makefile.mak.
 5.began the compile process.)
 
everything went all right at first, but soon I met some problems:
 1.the compiler complained that it doesn't know how to deal
   with the file "process.o", I found the corresponding entry
   in the makefile.win and commented it out.
 2.after I began to "rebuile all", the compiler informed that 
   it just couldn't find the .\ptypes2tcl, I checked the file,
   and found that it was in the root directory of the ns
    directory. So, this time I delete the '.\' and let 'ptypes2tcl'
          left.
 3.rebuild again, this time the compiler just said :
   link -LIBPATH:C:\Progra~1\Micros~2\VC98\lib /NODEFAULTLIB      
   /INCREMENTAL:NO /PDB:NONE /RELEASE /NOLOGO msvcrt.lib       
   oldnames.lib kernel32.lib  ws2_32.lib mswsock.lib advapi32.lib          
   -out:ptypes2tcl.exe ptypes2tcl.o
   ptypes2tcl > gen\\ptypes.cc
   NMAKE : fatal error U1077: 'F:\netsim\ns2\ptypes2tcl.exe' :      
   return code '0x20'

     I am almost exhausted. Is there anybody who can tell me what I should do?
                             thanks!!
 please contact me at the email address:huangpeng_buaa@yeah.net