VBseo Problem!

Hey.. i have installed vbseo on ma vbulletin (www.reggaetonloop.com/foros) is a 3.6.8 and when they send me the report update it said dis :

Hello!

The vBSEO Google/Yahoo Sitemap has been successfully generated for your vBulletin
forums at:
Reggaeton Loop (http://www.reggaetonloop.com/foros)

Report:
============================
Click the following link for your vBSEO Google/Yahoo Sitemap Report:
http://www.reggaetonloop.com/foros/vbseo_sitemap/

Summary:
============================
Forum Display: 57
Show Thread: 148
Show Post: 473
Member Profiles: 163
Poll Results: 0
Archive: 200

Total Indexed URLs: 1042
Total Processing Time: 22.24 seconds

Google ping: FAILED.
Yahoo ping: FAILED.

-I dont know y it say FAILED >?? :s .. wats wrong wit it..
??