open office won´t restart without reboot

after using OO port from portable apps menu and closing program, cannot re-launch any OO module (from PA.c menu or directly from disk module exe file) until after a system reboot. using Vista home basic w/sp2, OOP v3.2.0, on Acer Extensa 5230. Doesn´t matter if I re-open PA.c menu from tray or completely close PA.c then re-start it OOP modules will not start again until after a re-boot. I just tried using a direct launch from module exe, and multiple starts appears to be a problem only if the program has been launched from PA.c menu.