well we can not install it for you free so I cant look at it.
I can tell you to properly install you input the database info for photopost on the top portion and the forum on the bottom. They can be the same thats fine. Now on step 4 you select vb3 as the integration type and make sure to answer all the proper information on that step including what is the correct mysql table prefix of your vb
tables which can be found in your vb
config file just like the cookie prefix.