Problem in MTOM upload

Hi,

I am using SOAP UI 2.5 community edition to test my web services.

I have a functionality for file uploading. When I am attaching a file and enabling the MTOM, it doesn't send the request to the server. However, if I am disabling the MTOM, it sends the file without any problem.

Could someone tell what is the problem?

Thanks,
Niranjan