Systems Management

I have been trying to update from IE 7.0 to 8.0 using SMS2003 and this is the error I get.
"Software updates evaluation failed: could not run the scan component of the specified software update inventory tool on the client computer. The scan component program could not be found in the client cache or it returned failure status.
Possible cause: The scan component was removed from the client cache.
Solution: Re-run the advertisement for the scan component on the client computer. This will update the cache and might fix the problem.
Possible cause: Unknown scan component failure.
Solution: Review the status of the scan component of the specified software update inventory tool on this client."

Below is the command line which I use
PatchInstall.exe /g:120 /n /z:w /x /q /c:5 /p /t:30 /m: /update-no "PatchAuthorize.xml"

Any ideas would greatly be appreciated. I have re ran the advertisement a number of times, same message appearing.