Date format in Microsoft dynamics NAV windows client to web client

Hi Team,

I was uploading some data into NAV in the web client which is working fine but I have challenged when uploading into windows client, error message: "The value "06/29/2012" can't be evaluated into type Date". And the date format is mm/dd/yyy while the system is seeing the date format as dd/mm/yyy. I need your assistance in date format of the system. Thanks.