Issue in SOAPUI Call WebService incoming datetime string argument "is not a valid Allxsd value"

Set the incoming parameter in soapui to our usual date format Yyyy-mm-dd HH:mm:ss.fff such as: 2014-11-11 11:11:11.111 will error,

The error message is as follows:

<soap:envelope xmlns:soap= "http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi= "http://www.w3.org/2001/ Xmlschema-instance "xmlns:xsd=" Http://www.w3.org/2001/XMLSchema ">
<soap:Body>
<soap:Fault>
<faultcode>soap:Client</faultcode>
<faultstring>system.web.services.protocols.soapexception: The server was unable to read the request. There are errors in the---> System.InvalidOperationException:XML documentation (5, 66). ---> system.formatexception: The string "2014-11-05 15:03:50.963" is not a valid allxsd value.
In System.Xml.Schema.XsdDateTime. ctor (String text, xsddatetimeflags kinds)
In System.Xml.XmlConvert.ToDateTime (String s, XmlDateTimeSerializationMode datetimeoption)
In System.Xml.Serialization.XmlCustomFormatter.ToDateTime (String value)
In the Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReader1.Read1_NullableOfDateTime (Boolean Checktype)
In Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReader1.Read4_GetBudgetData ()
In Microsoft.Xml.Serialization.GeneratedAssembly.ArrayOfObjectSerializer4.Deserialize (Xmlserializationreader Reader
In System.Xml.Serialization.XmlSerializer.Deserialize (XmlReader XmlReader, String Encodingstyle, Xmldeserializationevents events)
---the end of the inner exception stack trace---
In System.Xml.Serialization.XmlSerializer.Deserialize (XmlReader XmlReader, String Encodingstyle, Xmldeserializationevents events)
In System.Xml.Serialization.XmlSerializer.Deserialize (XmlReader XmlReader, String encodingstyle)
In System.Web.Services.Protocols.SoapServerProtocol.ReadParameters ()
---the end of the inner exception stack trace---
In System.Web.Services.Protocols.SoapServerProtocol.ReadParameters ()
At System.Web.Services.Protocols.WebServiceHandler.CoreProcessRequest () </faultstring>
<detail/>
</soap:Fault>
</soap:Body>
</soap:Envelope>

WORKAROUND: Replace the date format with the following: Yyyy-mm-ddthh:mm:ss.fff: 2014-11-11t11:11:11.111 can be called normally.

Issue in SOAPUI Call WebService incoming datetime string argument "is not a valid Allxsd value"