run qt-embedded demos error on arm board

I got errors when run demos on the arm board.
qt-embedded 4.5.2

/ghye/demos/affine $ ./affine
QWSSocket::connectToLocalFile could not connect:: Bad file descriptor
QWSSocket::connectToLocalFile could not connect:: Bad file descriptor
QWSSocket::connectToLocalFile could not connect:: Bad file descriptor
QWSSocket::connectToLocalFile could not connect:: Bad file descriptor
QWSSocket::connectToLocalFile could not connect:: Bad file descriptor
QWSSocket::connectToLocalFile could not connect:: Bad file descriptor
No Qt for Embedded Linux ant to run this program as a server,
add the "-qws" command-line option.

/ghye/demos/affine $ ./affine -qws
QWSServerSocket::init: Address family not supported by protocol
QWSServerSocket: unable to crea/QtEmbedded-0
Aborted

what was wrong ??...

Maybe you have to set that QWS_DISPLAY variable to fit your setup:
http://qt.nokia.com/doc/4.5/qt-embed...anagement.html

Quote:

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QWSServerSocket: unable to crea/QtEmbedded-0

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Perhaps, read-only file system?

Append -qws to the end of your command.

ex. ./fluidlauncher -qws


Thanks,

VP.

EDIT: Woops, already tried that... :P

EDIT2: Try 'sudo -s' then run.