regarding bdc for automatic run

hi experts,

i have developed a bdc for hr in which the data is uploading from the excel sheet,what my user wants that this report will run automatically at 11 pm every day so for this send me the steps for this i know i have to exceute it in the background but how plz help me ...

***plz dnt send me the url come up with your own answer....

thnx in advance.....