Thanks for the qiuck reply!
Actually the main problem was, that fsx sometimes overwrote my standard.xml file, probably after certain system restarts, maybe found the CH products new, or sg. The most annoying thing was, that it also made the default axis and button assigns, which took a long time to erase time after time:)
It was my mistake, that I didnt know about the other standard.xml, which was located in the FSX root directory, being the base of making these changes. After editing it to be same as the one in %DOC% folder , hopefuly its never going to happen again. Now everything seems to work perfectly, after clearing all joystick controls (axis and buttons) in fsx. All axis, reverse thrust, even the PMDG aircraft specific keyboard-presses were set easily.
FSUIPC is in my opinion one of the greatest addon tools available, simply a must! Thanks again!
Zsolt Bondar