Robocopy log problem

I'm testing a very basic robocopy script that copied all txt files from drive f to drive x on the same server. i'm logged in as administrator, created the script, saved it as a cmd file.

If I run it with the log file, it erors out. if I run it without the log it works. This should be simple, but I can't get past it. I even created a new share for it to right the log into, but that failed with the same message. I've tried upper and lower case.

Latest version that worked without log file
robocopy.exe f:\ x:\ *.txt /E /SEC /NP /COPYALL /Log=robolog.txt

Microsoft Windows [Version 5.2.3790]
(C) Copyright 1985-2003 Microsoft Corp.

C:\xcopy-logs>robocopy.exe f:\ x:\ *.txt /E /SEC /NP /COPYALL /Log=robolog.txt

-------------------------------------------------------------------------------
   ROBOCOPY     ::     Robust File Copy for Windows     ::     Version XP010
-------------------------------------------------------------------------------

  Started : Sun Apr 24 10:24:52 2011
   Source - f:\
     Dest - x:\
    Files : *.txt
  Options : /S /E /COPYALL /NP /R:1000000 /W:30
------------------------------------------------------------------------------
ERROR : Invalid Parameter #8 : "/Log=robolog.txt"
       Simple Usage :: ROBOCOPY source destination /MIR

             source :: Source Directory (drive:\path or \\server\share\path).
        destination :: Destination Dir  (drive:\path or \\server\share\path).
               /MIR :: Mirror a complete directory tree.

    For more usage information run ROBOCOPY /? or read Robocopy.Doc.

NOTE: Read "True Replication" in Robocopy.Doc prior to first use of /MIR !
****  /MIR can DELETE files as well as copy them !

C:\xcopy-logs>

Test w/o the log file
Microsoft Windows [Version 5.2.3790]
(C) Copyright 1985-2003 Microsoft Corp.

C:\xcopy-logs>robo1.cmd
C:\xcopy-logs>robocopy.exe f:\ x:\ *.txt /E /SEC /NP /COPYALL
-------------------------------------------------------------------------------
   ROBOCOPY     ::     Robust File Copy for Windows     ::     Version XP010
-------------------------------------------------------------------------------

  Started : Sun Apr 24 10:18:25 2011
   Source : f:\
     Dest : x:\
    Files : *.txt
  Options : /S /E /COPYALL /NP /R:1000000 /W:30
------------------------------------------------------------------------------

                           1    f:\
        *EXTRA Dir        -1    x:\IMG000823\
        *EXTRA Dir        -1    x:\IMG000824\
        *EXTRA Dir        -1    x:\IMG000825\
        *EXTRA Dir        -1    x:\IMG000826\
        *EXTRA Dir        -1    x:\IMG000827\
        *EXTRA Dir        -1    x:\IMG000828\
        *EXTRA Dir        -1    x:\IMG000829\
        *EXTRA Dir        -1    x:\IMG000830\
        *EXTRA Dir        -1    x:\IMG000831\
            New File                  14        robotest.txt
                           4    f:\IMG000833\
                           0    f:\IMG000833\vdb_2011_04_20_2102_08\
                           4    f:\IMG000834\
                           0    f:\IMG000834\vdb_2011_04_21_1749_09\
                           4    f:\IMG000835\
                           0    f:\IMG000835\vdb_2011_04_22_1912_37\
                           4    f:\IMG000836\
                           0    f:\IMG000836\vdb_2011_04_23_1833_24\
                           0    f:\Jan-2011\
                           0    f:\RECYCLER\
                           0    f:\RECYCLER\S-1-5-21-1278163717-1751908949-1237765062-500\
        *EXTRA Dir        -1    x:\RECYCLER\S-1-5-21-1278163717-1751908949-1237765062-500\Dx1\
        *EXTRA Dir        -1    x:\RECYCLER\S-1-5-21-1278163717-1751908949-1237765062-500\Dx2\
                           0    f:\System Volume Information\
                           0    f:\VERITAS\
                           0    f:\VERITAS\B2D\

------------------------------------------------------------------------------

                Total    Copied   Skipped  Mismatch    FAILED    Extras
     Dirs :        15         0        15         0         0        11
    Files :        17         1        16         0         0         0
    Bytes :    1.22 m        14    1.22 m         0         0         0
    Times :   0:00:00   0:00:00                       0:00:00   0:00:00
    Ended : Sun Apr 24 10:18:25 2011
C:\xcopy-logs>