There is a new compose button on gmail. Make sure that your browser is up to date. If it is, try a different browser. (if you use internet explorer, try Mozilla etc) Also check to make sure that it isn't blocking pop ups. The new compose button may run into problems with this. Let us know if what works so we can help others.
PS I changed your email and removed the link. You should never post your personal email address in a public place unless you love to get spam.