Hi calum,
d3dx9_37.dll
This is because you are missing a file.
Step 1. You can download
d3dx9_37.dlld3dx9.net and
d3dx9_37.dllcentral here.
Step 2. Paste this file into your system32 and system folder. Also put it in your syswow
Step 3. Navigate to your System32(32Bit OS) or SyWOW64(64Bit OS) Folder.
Note: The location of System32 or SyWOW64 is
C:Windows\System32 (If you are using 32Bit Windows)
C:\Windows\SysWOW64 (if you are using 64Bit Windows)
Step 4.Paste the d3dx9_37.dll into this folder.
Step 5.Run the game. It might work now.