Unable to receive Custom Idoc from SAP B1 where as Standard IDOCS are working fine

I have created a Inbound Custom IDOC at ECC and when sent from SAP B1 it is not even visible in Queue(WE05). At SAP B1 end success message is shown as successfully handed over to SAP ECC. When i have sent Standard MATMAS IDOC it is received and visible at WE05.

I have created Outbound IDOCS as well for SAP B1 in which all are working fine.

Following the steps followed for Development at SAP ECC side.

1.Created Segments  (WE31)

2. Created Basic Idoc type and assigned Segments to IDOC Type( WE30)

3. Created Message Type (WE81)

4. Assigned Message Type and IDOC Type( WE82)

5. Created In Bound Function Module ( SE37)

6. Registered the In Bound FM (BD51)

7. Assigned FM, Message Type and IDOC Type ( WE57)

8. Maintained Inbound Process Code , created Logical message & Identification (WE42)

9. Maintained Inbound Partner Profile (WE20)

Can any one help me in resolving this problem.

Regards,

Miyandad.