//Set purchase on hold status...
        BasicHttpsBinding httpsBindingzz = new BasicHttpsBinding(BasicHttpsSecurityMode.Transport);

        AgreementServiceClient setPurchaseOnHold = new AgreementServiceClient();
        UpdateAgreementAdditionalDetailsRequest purchaseOnHoldSetRequest = new UpdateAgreementAdditionalDetailsRequest();
        UpdateAgreementAdditionalDetailsResponse purchaseOnHoldSetResponse = new UpdateAgreementAdditionalDetailsResponse();

        purchaseOnHoldSetRequest.UserName = "username";
        purchaseOnHoldSetRequest.Password = "password";
        purchaseOnHoldSetRequest.SystemToken = "systemtoken";
        purchaseOnHoldSetRequest.AgreementReference = customerAgreementNumberComboBox.Text;

        //The below key and values should set the purchase on hold to "OK"...
        STARTING FROM BELOW LINE IS WHERE THE ERROR STARTS... IV TRIED [1],2,3,4 ETC NO LUCK

        purchaseOnHoldSetRequest.AdditionalDetail[0].Description = "1";
        purchaseOnHoldSetRequest.AdditionalDetail[0].Key = "6";
        purchaseOnHoldSetRequest.AdditionalDetail[0].Value = "3";

        //Actual Request being sent and Response being recieved...
        try
        {
            purchaseOnHoldSetResponse = setPurchaseOnHold.UpdateAgreementAdditionalDetails(purchaseOnHoldSetRequest);
        }
        catch (Exception error)
        {
            this.logTextBox.Text = error.Message;
        }

[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.CodeDom.Compiler.GeneratedCodeAttribute("System.Runtime.Serialization", "4.0.0.0")]
[System.Runtime.Serialization.DataContractAttribute(Name="AdditionalDetail", Namespace="APIWEB...")]
[System.SerializableAttribute()]
public partial class AdditionalDetail : object, System.Runtime.Serialization.IExtensibleDataObject, System.ComponentModel.INotifyPropertyChanged {

    [System.NonSerializedAttribute()]
    private System.Runtime.Serialization.ExtensionDataObject extensionDataField;

    [System.Runtime.Serialization.OptionalFieldAttribute()]
    private Account_Status.ServiceReference2.DataType DataTypeField;

    [System.Runtime.Serialization.OptionalFieldAttribute()]
    private string DescriptionField;

    [System.Runtime.Serialization.OptionalFieldAttribute()]
    private string KeyField;

    [System.Runtime.Serialization.OptionalFieldAttribute()]
    private Account_Status.ServiceReference2.LookupItem[] LookupListField;

    [System.Runtime.Serialization.OptionalFieldAttribute()]
    private bool ReadOnlyField;

    [System.Runtime.Serialization.OptionalFieldAttribute()]
    private string ValueField;

    [global::System.ComponentModel.BrowsableAttribute(false)]
    public System.Runtime.Serialization.ExtensionDataObject ExtensionData {
        get {
            return this.extensionDataField;
        }
        set {
            this.extensionDataField = value;
        }
    }

    [System.Runtime.Serialization.DataMemberAttribute()]
    public Account_Status.ServiceReference2.DataType DataType {
        get {
            return this.DataTypeField;
        }
        set {
            if ((this.DataTypeField.Equals(value) != true)) {
                this.DataTypeField = value;
                this.RaisePropertyChanged("DataType");
            }
        }
    }

    [System.Runtime.Serialization.DataMemberAttribute()]
    public string Description {
        get {
            return this.DescriptionField;
        }
        set {
            if ((object.ReferenceEquals(this.DescriptionField, value) != true)) {
                this.DescriptionField = value;
                this.RaisePropertyChanged("Description");
            }
        }
    }

    [System.Runtime.Serialization.DataMemberAttribute()]
    public string Key {
        get {
            return this.KeyField;
        }
        set {
            if ((object.ReferenceEquals(this.KeyField, value) != true)) {
                this.KeyField = value;
                this.RaisePropertyChanged("Key");
            }
        }
    }

    [System.Runtime.Serialization.DataMemberAttribute()]
    public Account_Status.ServiceReference2.LookupItem[] LookupList {
        get {
            return this.LookupListField;
        }
        set {
            if ((object.ReferenceEquals(this.LookupListField, value) != true)) {
                this.LookupListField = value;
                this.RaisePropertyChanged("LookupList");
            }
        }
    }

    [System.Runtime.Serialization.DataMemberAttribute()]
    public bool ReadOnly {
        get {
            return this.ReadOnlyField;
        }
        set {
            if ((this.ReadOnlyField.Equals(value) != true)) {
                this.ReadOnlyField = value;
                this.RaisePropertyChanged("ReadOnly");
            }
        }
    }

    [System.Runtime.Serialization.DataMemberAttribute()]
    public string Value {
        get {
            return this.ValueField;
        }
        set {
            if ((object.ReferenceEquals(this.ValueField, value) != true)) {
                this.ValueField = value;
                this.RaisePropertyChanged("Value");
            }
        }
    }

    public event System.ComponentModel.PropertyChangedEventHandler PropertyChanged;

    protected void RaisePropertyChanged(string propertyName) {
        System.ComponentModel.PropertyChangedEventHandler propertyChanged = this.PropertyChanged;
        if ((propertyChanged != null)) {
            propertyChanged(this, new System.ComponentModel.PropertyChangedEventArgs(propertyName));
        }
    }
}