dataPath issue

[SaurabhChouhan]

I have used dataPath in form below

isc.DynamicForm.create({
dataSource:"PaymentDataSource",
ID:"PaymentCreateForm",
autoDraw:false,
numCols:"6",
fields:[
{name:"paymentAmount",type:"float",title:"paymentAmount",keyPressFilter:"[0-9.]"},
{name:"customer",type:"select",title:"customer",required:true,
dataPath:"/customer/customerId",optionDataSource:"CustomerDataSource",displayField:"firstName",valueField:"customerId"},
{name:"lastUpdate",type:"date",title:"lastUpdate",required:true,dateFormatter:"toUSShortDate"},
{name:"paymentDate",type:"date",title:"paymentDate",required:true,dateFormatter:"toUSShortDate"}
]
});

When I submit this form following xml is posted to server, please see that customer element is empty.

<Payment>
<lastUpdate>2011-07-26T18:30:00</lastUpdate>
<paymentDate>2011-07-26T18:30:00</paymentDate>
<paymentAmount>10</paymentAmount>
<customer> </customer>
</Payment>


But if I change type of paymentAmount (first field in form) to text then following xml is posted to server as desired

<Payment>
<lastUpdate>2011-07-26T18:30:00</lastUpdate>
<paymentDate>2011-07-26T18:30:00</paymentDate>
<paymentAmount>33</paymentAmount>
<customer>
<customerId>1</customerId>
</customer>
</Payment>

I am using SmartClient 8.0 Evaluation version.