Strange Issue using FileUpload Control Error 400 when large file

Hi,

There is a requirement like in a web page having FileUpload control and buttion. I need to upload excel records to sql database. If the excel file having less than 1000 records then it is execting fine and if the excel file having more than 1000 records then it's giving me the error message like bad request (error code: 400). As per my requirement need to upload minimum 4000 to 5000 records on button click. Some times it is woring fine in IE browser but not all the times. In mozilla not at all working if records having more than 1000. How can i over come this issue.

Regards

Satyam