System.FormatException Input string was not in a correct format. Method:ParseInt32

[Kenny]

Hi,

I am using OpenwaveSDK 5.1
System.FormatException Input string was not in a correct format.
MethodarseInt32

Anyone know why this happened?

<mobile:Form id="Form1" runat="server">
<mobile:Link id="Link1" runat="server"
NavigateUrl="#Form2">Link</mobile:Link>
</mobile:Form>

<mobile:Form id="Form2" runat="server">
<mobile:SelectionList id="SelectionList1" runat="server">
<Item Value="Form2_A" Text="Form2_A"></Item>
<Item Value="Form2_B" Text="Form2_B"></Item>
<Item Value="Form2_C" Text="Form2_C"></Item>
</mobile:SelectionList>
<mobile:Command id="Command1" runat="server">Command</mobile:Command>
</mobile:Form>

Thanks,
Kenny