problem with batch file running in windows 7 pro workstation

What do you want to do?  Ping a list of workstations and generate a list of those that respond?  If so, your batch file is highly flawed.  The last error state is the one that's echoed (or would be if that part were right) which means you could have station1 to station5 and if 1-4 are on but 5 is off, you just get nothing.  Plus, you're overwriting success.txt every time you run the batch file.

Try this:

@echo off
Set OutputFile=success.txt
If Exist %OutputFile% Del %OutputFile%
for /f %%a in (list.txt) do (
	ping -n 1 %%a | find /i "reply">nul
	if "%errorlevel%" NEQ "1" echo %%a>>%OutputFile%
)

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I don't see the "falling" part:

cls
del success.txt fail.txt 2>nul
for /f %%i in (wks2.txt) do ping %%i -n 1 | find "Reply">nul && echo %%1>>success.txt || echo %%i>>fail.txt
if not errorlevel 1 echo %%i>success.txt

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If you can add a utility to the target computer, use ifping
http://www.anykeyonline.nl/oldsite/documents/44.html

Solution by Lee W - the output has all workstations whether they work or not in success.txt (Doesn't work)
Solution by Hackoo - Is there anyway to separate the output into two files. worked.txt and failed.txt (worked, but I need a few changes)
Solution by Shaun Vermaak - Boss won't let me use third party apps