[RE:DNN.USerInfo.FirstName] replacements

I am trying to use the replacement tags to identify my users when they login.  This works fine in a text/html module however when no one is logged in then I see [RE:DNN.USerInfo.FirstName].  how do I use the replacement  so that this doesn't happen?

Thanks

JimmyFoo

John,

Thank you for the quick responce.

I still however have a problem.  I did what you said and I get mixed results.

1. If I put the rule in the portal rules I get nothing when the user is logged off (this is what I want).  But when the user is logged on I get ",cssb:'eipbuttonbackimg',cssbh:'eipborderhover'};"
2. If I put the rule into the Page rules I get the correct result when logged on the first name shows. But when logged off I get the entire tag [RE:DNN.USerInfo.FirstName]

You can recreate the issue by just adding the tag [RE:DNN.USerInfo.FirstName] to a Text/HTML module and then creating the rule
SearchFor: \[RE:.*]
ReplaceWith:

Please help