Error In BRE Policy, Please Help

I dont understand what is causing this error. Please Help..

Event Type: Error
Event Source: XLANG/s
Event Category: None
Event ID: 10034

Description:
xlang/s engine event log entry: Uncaught exception (see the ‘inner exception’ below) has suspended an instance of service ‘HIPAADecision.ProfessionalDecider(125e565a-a1cd-c6cb-d5e2-25eb93f502c1)’.
The service instance will remain suspended until administratively resumed or terminated.
If resumed the instance will continue from its last persisted state and may re-throw the same unexpected exception.
InstanceId: 567ee583-334c-4651-bd46-3ea2765ada65
Shape name: Call Rule
ShapeId: fc2ba9b8-e64d-4be3-957e-a4324d02163b
Exception thrown from: segment 2, progress 10
Inner exception: An exception occurred inside the rule engine instance executing policy “Policy”.
       
Exception type: PolicyExecutionException
Source: Microsoft.RuleEngine
Target Site: Void ExecuteInternal(System.Object)
The following is a stack trace that identifies the location where the exception occured

   at Microsoft.RuleEngine.Policy.ExecuteInternal(Object facts)
   at Microsoft.RuleEngine.Policy.Execute(Object facts)
   at Microsoft.RuleEngine.Policy.Execute(Object[] facts)
   at HIPAADecision.ProfessionalDecider.segment3(StopConditions stopOn)
   at Microsoft.XLANGs.Core.SegmentScheduler.RunASegment(Segment s, StopConditions stopCond, Exception& exp)
Additional error information:

        OleDbCommand.Prepare method requires all variable length parameters to have an explicitly set non-zero Size.
       
Exception type: InvalidOperationException
Source: Microsoft.RuleEngine
Target Site: Void ProcessException(System.Exception)
The following is a stack trace that identifies the location where the exception occured

   at Microsoft.RuleEngine.Rete.Rete.ProcessException(Exception ex)
   at Microsoft.RuleEngine.Rete.Rete.AssertInternal(Object facts, Object data)
   at Microsoft.RuleEngine.Rete.Rete.ProcessingLoop(Operation operation, Object facts, Object data, EngineState nextState)
   at Microsoft.RuleEngine.Rete.Rete.Execute(Object facts)
   at Microsoft.RuleEngine.Policy.ExecuteInternal(Object facts)

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Thanks you