QuteCom: display problem

hello everybody,

My Qutecom portable don't display correctly on some computer. The program seems working (i can log) but all the icons and graphic part doesn't display and this in all tabs. Even the small icon on the task bar doesn't display. you can see the problem in picture here: http://www.toutenmarchant.com/public_sharing/qutecom_issue.JPG

On the computer which can't display the portable version, the non-portable version works fine.

any clue?