problem with ibproarcade.

Hi my forums runs in php5 extensions,and my forums require all php files to be in the extension php5,so I applied a search and replace,and every problem was fixed accept the adding new scores funtion,everytime I finish a game,when it tries to add a new score,it goes to forums/index.php?act=Arcade&do=newscore instead of forums/index.php5?act=Arcade&do=newscore

How do I fix this.