AX 2012 R3 CU8 and CRM 2013 Integration

Dear All,

I tried to integrate Dynamics ax 2012 R3 cu8 and CRM 2013 using the procedure in this link(…/)..)

I am integrating “Cases” entity in AX to “Cases” entity in CRM.

while configuring the newly created port in Dynamics AX connector I am getting the error

[Value cannot be null, Parameter name: type].

pls help me to solve this, or give me steps to integrate AX and CRM with “Cases” Entity thanks.