Receving a flatfile attachment via Email in IS601

Hello All,

I have some problem while receving a flatfile sent as email Attachment to ISServer.

Attachment file is in .dat format

So I updated the ISServer/lib/mime.types file and included the line
application/x-wmflatfile dat

and restarted the ISServer.

The inbound mail is invoking a globalservice (testemailReceive) which has input set to *ffdata. (we put savepipe/restorepipe and nothing has been logged in that)and also used getTransportInfo service and we got all the header details of email but not content.

We are seeing error in the Server log:
ISC.0076.0007W] XMLCoder decode invalid data type:

Please advise,if i am missing anything to configure.Urgent!!!