I have downloaded ASE 12 NT 60 day evaluation copy and tried to install it

I encounterned the following problem:

during the installation process the installer asked if it is ok to
overwrite c:\winnt\system32\MSVCRT.dll

i choosed 'OK' and installation continued - then came the machine reboot (i
guess for unloading the dll and overwriting it with the new one - maybe
something went wrong here?)

anyway, when loggin on again i got several system error messages saying
"cant find procedure entry point ??_U@YAPAXI@Z in DLL MSVCRT.dll"
(actually, the message comes in german language...)

i get the same messge when starting sqlsrv.exe (after popping up the error
message it quits)

i am completly new to sybase ase so i do not know if this is critical or if
this is normal or easy to work around -- but you can image my motivation
in continuing to install the server is pretty low if the basic system
components seem to be invalid...!

has anyone experienced a similar problem?
has anyone a URL to a step-by-step - installation guide?

I am using Windows NT 4.0, Service Pack 5, the size of msvcrt.dll is
266.293 bytes

i would be glad to get any hint, tip, link or any other kind of info!

joachim peer