Material master form ECC to GTS

We have 2 systems where the material master has to be

exchanged .the idocs sent from ECC are of type MATMAS03

and message type /SAPSLL/MATMAS_SLL

these idocs are sucessfully sent but at the receiver end of

GTS system the idocs are received with error

they say Matmas03 doesnt exist

As they say they do not exist in GTS

Is there a way out to change the inbound idocsmessage type

or to have different message types at the outbound and different at the inbound to make it compatible please advice