expired texas nursing license

Does anybody know what's the process to renew an expired texas nursing license? We have looked through the texas board website, and all we can find is the link to renew a current license; we tried calling the board too, but all we get is, 'representative is busy now; please try calling later.' We even left the phone on speaker for 45 minutes while waiting for the representative to come on the line, and even after 45 min, no luck!
thanks!