Business connector error in the event log during workflow execution in ax2009

Dear All,

 Am getting the below error in the event log during the execution of the workflow in AX2009.

Microsoft.Dynamics.BusinessConnectorNet.NoIISRightsException
at Microsoft.Dynamics.BusinessConnectorNet.Axapta.Logon(BC_PROXY_ACCOUNT_INFO* pBCProxyAccountInfo, String company, String language, String objectServer, String configuration)
at Microsoft.Dynamics.BusinessConnectorNet.Axapta.LogonUsingBCProxyAccount(_SEC_WINNT_AUTH_IDENTITY_W* pImpersonatedUserAccount, NetworkCredential bcProxyCredentials, String company, String language, String objectServer, String configuration)
at Microsoft.Dynamics.BusinessConnectorNet.Axapta.LogonAs(String user, String domain, NetworkCredential bcProxyCredentials, String company, String language, String objectServer, String configuration)
at Microsoft.Dynamics.Framework.BusinessConnector.Session.DynamicsAdapter.LogonAs(String user, String domain, NetworkCredential bcProxyCredentials, String company, String language, String objectServer, String configuration)

I have checked online for this issue and found that this error might be occur when there is no licence for Enterprise portal framework and EP users. I have checked that case we have the licence for both. Also I have checked for the access of the BC proxy account it also has admin access in both server and AX.

Please help me if anybody has some idea about this error in the event log.