Error using the Dynamics Connector with AX and CRM...

Hi,

We are trying to set the Connector up to syncronize AX2012 with CRM2011. The first step according to the documentation is to syncronize Enumerated values and Picklists. This works like a charm.

Every other map we are trying to run fails with the log following log, though with different map names:
" [Exchange Rate Service to Currency] has encountered an error. Processing will be aborted. Operation is not valid due to the current state of the object."

Any idea of how to address this is more than welcome!

This is an extraction from the Microsoft.Dynamics.Integration.Service.log file.

ERROR TID:11 [2011-10-17T13:55:47.0192161+02:00]: [Exchange Rate Service to Currency] has encountered an error. Processing will be aborted. Operation is not valid due to the current state of the object.
 --- Exception Dump ---
 Caught Exception: Operation is not valid due to the current state of the object.
 Stack trace:
   at Microsoft.Dynamics.Integration.Adapters.AX.Common.DynamicProxyFactory.CompileProxy()
   at Microsoft.Dynamics.Integration.Adapters.AX.Common.DynamicProxyFactory..ctor(String wsdlUri, String assemblyName, Boolean forceRefresh)
   at Microsoft.Dynamics.Integration.Adapters.AX.Common.Utility.GetDynamicProxyFactory(String aosServer, Int32 port, String portName, Boolean forceProxyRefresh)
   at Microsoft.Dynamics.Integration.Adapters.AX.Common.DynamicService.get_Proxy()
   at Microsoft.Dynamics.Integration.Adapters.AX.Common.DynamicService.get_Client()
   at Microsoft.Dynamics.Integration.Adapters.AX2012.DynamicServiceObjectProviderBase.ReadObjectKeys(DateTime modifiedDate)
   at Microsoft.Dynamics.Integration.Service.MapThread.ProcessReads()

WARNING TID:11 [2011-10-17T13:55:47.0348416+02:00]: An unrecognized exception was thrown [Microsoft.Dynamics.Integration.Adapters.AX.Common::0x80131509].