Can't publish base CRL...File already exists

I have a script running weekly on a Windows 2003 Certificate server that recreates our CRL and publishes the new crl. It is defined as follows:

@echo off
certutil -CRL
c:\scripts\sleep 5
copy /y %windir%\system32\certsrv\certenroll\*.crl c:\crldata
copy /y %windir%\system32\certsrv\certenroll\*.crt c:\certdata
certutil -dspublish -f -v "c:\windows\system32\certsrv\certenroll\abc.crl" > PublishCrl.log

When the "dsPublish" command runs it generates the message:

Certificate Services could not publish a Base CRL for key 0 to the following location: C:\WINDOWS\system32\CertSrv\CertEnroll\abc.crl. Cannot create a file when that file already exists. 0x800700b7 (WIN#@/HTTP: 183)

When I run the "dsPublish" command manually it comes back and says "Base CRL added to DS Store" Certutil: -dsPublish command completed successfully.

I just added the "-v" switch and the pipe to the log file today so I don't have any output from this yet. What do I need to do to fix this?

Thanks.