The most common reason for this is the game is running over its required 59.95hz, the game is hardcoded to run at 59.95hz and this cannot be changed. To solve this, check [this section](/games/iidx10/setup/#locking-the-games-fps) of the guide again.
Inside the [Bemanitools Supplement](https://github.com/djhackersdev/bemanitools-supplement/releases/download/1.6/bemanitools-supplement-1.6.zip) archive, navigate to `\iidx.zip\iidx\misc\` where you'll find `CLVSD.ax`.
Extract `CLVSD.ax` inside a folder that you know won't be moved or renamed.
Open up the command prompt as ***administrator***. Now type `regsvr32 "<location of the file>\CLVSD.ax"` into the command prompt.
As an example, it could look like this: `regsvr32 "D:\BEMANI\IIDX\CLVSD.ax"` A prompt should appear telling you that it has been installed successfully.
This applies for all styles that require this codec.
If an error occurs, you didn't run the command prompt as administrator or you messed up the location of the file.
You ***can not*** move or delete `CLVSD.ax`***at all***, otherwise it will revert the changes and you have to install it again.
!!! warning "This can have multiple reasons. These fixes shouldn't be needed for 10th style since we're addressing them in the guide. We'll add them anyway just in case."
