Start-process -arguments

Hi,

Can anyone see why this is running the program but not passing the arguments across.  It fires up but then closes, with no logs that I can find

$startRichCopy = "C:\RichCopy4.0\RichCopy64.exe"
$arguments = "d:\internal \\remotenas.qav-dr.com\QAV-SS1_Remote\e_internal /QA /UE /US /UD /UC /UPF /UPC /UPS /UFC /UCS /USC /USS /USD /UPR /UET"
start-process $startRichCopy $arguments

Thanks

Alter De Ruine