msiexec is running on w2k but not on XP

Hi all,
I got the following code which is working on w2k but not on WinXP:

$path = @scriptdir
$path = $path&"\sametimesisd.msi"
RunWait(msiexec /i "&$path)

Has  someone any idea why this is not working on XP?
The error I see is:
Line 0 (File "T:\updates\sametime\sametimeupdate.exe");
RunWait("msiexec /i "&$path)
Error: Unable to execute the external program.
The directory name is not valid   (In German: Der Verzeichnisname ist 
ungÃŒltig)


Regards,
Stefan



 
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