Function Module call not giving result

Hi All,

I am calling a function module by consuming it in Web Dynpro by Adaptive RFC model.

But i am not getting any result on execution and not any exception also.

I am using a communication user in my JCO and by using the same JCO i am able to call a BAPI

Is there is any problem with the authorization the user is having because i am able to call the bapi BAPI_CUSTOMER_GETINTNUMBER and not able to call the Function Module ENQUEUE_READ to read the lock entries

Is anyone has faced such issues?

Regards,

Amol