I found a problem in both Smartphones (Mio 8390 and Dopod 565) that when my WML code has the following form (written in ASP):

<anchor>GO!<go href="somewhere.aspx" method="post">
<posifield name="myname" value="<%=myvar%>" />
</go></anchor>

If the value of myvar is empty, then the link cannot be reached. If myvar is something, then the location somewhere.aspx is ok to proceed.

Is this normal in Smartphone's browsers? I also found out that if there's not any postfield element, only the get method can be used otherwise "post" still have the same situation.