None of the eMail subscription codes from FeedBurner work for me

I opened an accout in Feedburner to manage email subscriptions, but none of the pieces of code from feedburner seem to work in my blog. I’ve seen from other posts that the first choce doesn’t work in WP. What about the second one? This is the code

<a href="http://feedburner.google.com/fb/a/mailverify?uri=Innopole&amp;loc=es_ES" by Email</a>

Any idea?

Thanks a lot in advance

Aitorelo