Just out of interest it was the "Thank-You" mod that caused the conflict. And here was andrew belcher's fix if anyone runs into the same problem:
function get_page($num_items, $per_page, $start_item)
function get_page_no($num_items, $per_page, $start_item)
$current_page = get_page($total_replies, $board_config['posts_per_page'], $start);
$current_page = get_page_no($total_replies, $board_config['posts_per_page'], $start);
We have a new problem!
Error! The WP-United Connection could not be installed. This is probably due to one of the following being set incorrectly: (a) invalid path to WordPress, (b) invalid script path set for phpBB in board config. Please correct these and try again.
I'm pretty sure I got these right:
WP install: C:/Inetpub/wwwroot/test/wpforum/blog/
And I check it and it says a success and then the script folder is: /test/wpforum/
one thing. I tried checking the URL using the "Test" and it says there are Errors on the page. After testing the URL I can't detect the WP install (The button does nothing, the page just breaks). But if I don't test the URL then the Detect seems to work.