Xrumer Blocking My Domain?

Hrm, i just did an blast few days ago, and when im chatting with a friend in yahoo, i told him to check my website he asked for the url, i give him the url, and he said he can't view the domain? seems like its blocked by yahoo or ?

http://downforeveryoneorjustme.com/

run cmd.exe and enter:
ipconfig /flushdns

restart your browser, recheck if your site is viewable in all browsers...