Using COP command

[IzK666]

Hi!
I want to ask something about cop command and flags.
I'm having trouble when using flags for this command. I don't know what I'm doing wrong.

Code:

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,a.format("%s%s" Path1 F1)
,b.format("%s%s" Path2 F1)
,out "Cop %s %s" a b
,;;;Cop D:\Documents and Settings\IzK\Desktop\1234\F\QP\File.qpw D:\Documents and Settings\IzK\Desktop\1234\B\QP\File.qpw
,cop a b FOF_SILENT|FOF_NOCONFIRMMKDIR|FOF_FILESONLY

I need to use the flags: FOF_SILENT, FOF_NOCONFIRMMKDIR, FOF_FILESONLY, but ever crashes. I have tried to use 644 and 0x284 as flag, but crashes too.
I don't know what to do. In the code, the comment is the output from previous order.
The only diference between source and destination is marked in bold (I show the end of string):
\B\QP\File.qpw

I hope you can help me.
And sorry for my bad english.

Thanks.
IzK