[Typo3-shop] shipping options template

[Peter Bauer]

I am trying to use a custom-template for the shipping options.
Here the code of my setup:

plugin.tt_products.shipping {
   radio = 1
   template = <nobr>###IMAGE### <input type="radio" 
name="recs[tt_products]['.$key.']" onClick="submit()" 
value="###VALUE###"###CHECKED###> ###TITLE###</nobr><BR>
}

In this example the template-string is equal to the default 
template-string, but the result is as follows:

On selecting a shipping option, the formular is submitted and the page 
is reloaded. But instead of MY shipping option being checked, it is 
allways a certain other option.

Anybody knows why?

Greets Peter