RSBDCSUB- Session has lock date in the future

Hi Experts,

I need to execute my BDC session from my Z**program using :

submit rsbdcsub with mappe = <seesion-name>

with von = sy-datum

with bis = sy-datum

with fehler = '' "

exporting list to memory

and return.

but i am getting the following error :

"Processing is not permitted. Session has lock date in the future.

Please tell me what could be the reson.

if i give von & bis as ' ', still am getting the same error.

Can someone help me with this?

Thanks

Dany