Error when opening a openoffice module

hi!

i have already installed openoffice.org Portable on a 2GB USB flash disc with FAT32. i get an error message, when i try to open one of the modules like impress.

the error message is:
the application cannot be started.
the user interface language cannot be determined.

can you help me with my problem?

many thanks for advance.

best regards,

bpczi