poll does not appear in admin section

hi,
i created a new poll, deleted the default polls, and everything was fine. next day i got to the admin section, and the default polls were back, but the poll i created was gone,although it is still working. so its not gone from the system, but i cannot edit it anymore. i created a second poll, which is displayed in admin section, but not working ( error like "poll id1 does not exist"). when i checked the files on the server i found the chmod i made the day before had been reset to the servers defaults rw-r-r .
would be cool if one you could help me
thank you