i'm having a big problem with my forum . i always submit keyword rich content and have been doing very well in google for the past 2 years we had more then 700,000+ pages indexed by google & we used to have a really high ranking. after i've converted my forum from vb to xenforo since 6 months ago For some reason we lost our ranking in google and all of our external site links. & now we only have 48,000 pages indexed by google & the number is still decreasing .
well after i converted from vb to xenforo i've used a 301 redirect to redirect my old links to the new ones
the old link : http://www.afaqmaroc.com/vb/
the new link : http://www.afaqmaroc.com/forum/
by the way my forum is an arabic forum
I am looking for support as to why this has happened. We have followed all the rules for google.