root explorer question

[ellisz]

Alright, this is off topic now but...
I have adb installed and at the command prompt typed adb and got a bunch of adb stuff.

I read a little of the ADB link from Abe21599 signature. I think I can use your command if the prompt is at c:/android/tools

OK, I tried this:
adb shell
su
mount -o remount,rw -t yaffs2 /dev/block/mtdblock4 /system
exit
exit

Then:
adb push quiet.ogg /system/media/audio/notifications/quiet.ogg

I got a failed to copy ... permission denied.

Any ideas? If I try to push before the mount command, I get a Read only error.

Thanks