Not Able To Upload PDF To DMS Using ODATA And SAPUI5

Hi Experts,

I have to upload pdf to DMS using Odata and SAPUI5,I googled and following these links.

1). http://scn.sap.com/community/gateway/blog/2013/08/14/how-to-upload-and-download-files-using-sap-nw-gateway

2). http://scn.sap.com/community/developer-center/front-end/blog/2014/07/28/upload-image-to-sap-gateway-and-display-image-in-ui5--using-new-fileuploader-with-sap-gateway

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Now i am explaining my procedure.

1). I have a FM which uploads the contents to DMS.

2). In OData creation, Importing RFC and Defining mapping.

3). Defining MPC_EXT->Define method.

4).Defining  /IWBEP/IF_MGW_APPL_SRV_RUNTIME~GET_STREAM class .

4). When i registering the in /iwfnd/maint_service getting error

I googled this error but can not find anything .

Thanks in advance.