how to redirect all old phpBB links to new VB index

[mobile4persian]

hi.
i have recently moved from phpBB 3 to VB 4.2.1 every thing is ok but because i have moved my phpBB files now google gets 404 not found and it's very bad .

my old phpBB boad was at www.mobile4persian.net
and you can see the index status here

my new board location is at: http://forum.mobile4persian.net/

i have redirect the www.mobile4persian.net to http://forum.mobile4persian.net but i want to to redirect all old links to the Vb index.
my roo .htaccess is here now:

RewriteEngine on
RewriteCond %{HTTP_HOST} ^mobile4persian\.net$ [OR]
RewriteCond %{HTTP_HOST} ^www\.mobile4persian\.net$
RewriteRule ^/?$ "http\:\/\/forum\.mobile4persian\.net\/" [R=301,L]

and the .htaccess i have at forum is seperate as VB-SEO has generated it.

any help would be appreciated.