Workflow doesnot automatically trigger mail ..

Hi MDM Gurus,

I am trying to design a simple workflow

Start >Process >Approve-->Stop.

This flow Or workflow works and does trigger a mail to approver and processer when i execute the workflow Manually .i.e In Datamgr i select the record... go to records in header --workflow and execute the corresponding workflow..evrything works fine..

But when i put the XML file in ready folder(to automatically suck into datamanager with help of MDIS server) of respective repository..Workflow doesnot trigger a mail...What can be the reason ..I have checked the mds.ini file and it has server path in it.

Please can anyone let me know what can be the problem...

Regards,

Vikrant...