Problem with Google Search

[floggerss]

I have a problem, my sitw was having + 2100 visit per day, more than the half were from google. But one day to another google stop to send me visitis.... after eight day y am recovering the visits, but i think the problem are the url.

If you look in google floggerss it give you this
http://www.google.com.ar/search?hl=es&q=floggerss&btnG=Buscar+con+Google&meta=

mi site is floggerss.com.ar or you put in google site:floggerss.com.ar

http://www.google.com.ar/search?hl=es&q=site%3Afloggerss.com.ar&btnG=Buscar&meta=

It gives you all the link but almost all of them DONT WORK... the url are differents i dont know what i install... because i dindt install the mod that change the urls

For example before this problem the link was
http://www.floggerss.com.ar/offtopic

Now the same it is:
http://www.floggerss.com.ar/forumdisplay.php?f=11


I re dend the SITE Map, but it shows me that it have


1.830 Errors in site Map

And

34.971 URL dont found

What should a Do, i wait that google use the new links or try to back to the OLD links....

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Nobody?