Two in

I have following translation in my Java project:

my.translation={0} ... {1}

I want to put parameters inside my fmt:message tag. I have found out that this works with one parameter, e.g.:

<fmt:message key="my.translation">
   <fmt:param value="${oneParam}"/>
</fmt:message>

but not with two of them:

<fmt:message key="my.translation">
   <fmt:param value="${firstOne}"/>
   <fmt:param value="${secondOne}"/>
</fmt:message>

As I can't figure it out, how this situation should be handled, can somebody help me?

Thanks in advance.