Batch: if statement not working correctly - win x86 xp

[isdigit]

Hello, I am trying to use a batch file to automate mounting network drives. When the drive is not mounted to F:, net use returns 0 and it exits correctly. When it is already mounted, it returns 2 but my if statement is not working correctly. It never goes to the method retry.

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SET a = 0
@ECHO OFF

ECHO ________________________________________________________ >> C:\Mounting.txt
ECHO Trying to mount forms to F:\ drive: %date% %time% >> C:\Mounting.txt
net use F: \\grfs01\groupdirs$\forms
ECHO Error level: %errorlevel% %date% %time% >> C:\Mounting.txt
if ERRORLEVEL 0 (GOTO :exit) ELSE ( GOTO retry )

:retry
set /a a +=1 
if %a == 6 (GOTO error)
ECHO Error: %date% %time% >> C:\Mounting.txt
ECHO Dismounting volume: %date% %time% >> C:\Mounting.txt
net use F: /Delete
ECHO Remounting volume: %date% %time% >> C:\Mounting.txt
net use F: \\grfs01\groupdirs$\forms  
ECHO Error level: %errorlevel% >> C:\Mounting.txt
IF errorlevel 0 (GOTO :exit) ELSE (GOTO retry)


:exit
ECHO Forms folder sucessfully mounted: %date% %time% >> C:\Mounting.txt
exit

::error
ECHO Unknown error: %data %time% >> C:\Mounting.txt
exit

Some output:

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_______________________________________________________________  
Trying to mount forms to F:\ drive: Wed 09/01/2010 11:29:37.04 
Error level: 0 Wed 09/01/2010 11:29:37.08 
Forms folder sucessfully mounted: Wed 09/01/2010 11:29:37.10 
_______________________________________________________________  
Trying to mount forms to F:\ drive: Wed 09/01/2010 11:29:45.60 
Error level: 2 Wed 09/01/2010 11:29:45.66 
Forms folder sucessfully mounted: Wed 09/01/2010 11:29:45.66 

[jeb]

This explains it: "if /?"

if errolevel number --- condition is fulfilled, if errorlevel is greater or equal than number

I suppose, your errorlevel will always greater or equal than zero

At the end of "if /?" there is explained the other way.
So this should work

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if %ERRORLEVEL% EQU 0 (GOTO :exit) ELSE ( GOTO retry )

[isdigit]

Yes, I now remember reading that.... Thanks for you assistance!

Edit:
Also, the ECHO right before the first if statement returns 0 so it will always go to method exit. I had to remove this part to make it completely functional:

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::ECHO Error level: %errorlevel% %date% %time% >> C:\Mounting.txt
if ERRORLEVEL 0 (GOTO :exit) ELSE ( GOTO retry )

isdigit