Hi, I am Unable to Create a Adapative RFC2 Model

I am unable to create a adapative RFC2 model.

It showing an error when i am configuring R/3 like

com.sap.conn.jco.JCOException:(103): JCO_ERROR_LOGON_FAILURE: No RFC authorization for function module RFCPING. on VM2IDES6 sysnr:00.\

Connection failed to configure different R/3 destination in IDE.

Thanks in advance

Devi