No Disk Inserted

[TheCalcium]

I'm trying to play Kingdom Hearts.
I first tried to run it directly from the DVD but the introduction cutscene is extremely choppy on the fps and audio, it would take roughly 15 minutes just to finish watching it.
I looked around online on how to fix it and some people suggested using an iso instead of the dvd. I tried running it from an iso as well, and I'm not sure if I'm doing it correctly, but the ps2 bios screen appears with the red colour telling me to insert a playstation disk. Is there a way I can fix the lag without using an iso file? Or do I just have to properly use the iso?

Here are my specs and non-default settings:
Plugin Configurations:

GSdx 0 (MSVC 18.00,SSE2) 0.1.16 [gsdx32-sse2-r5875]:
Adapter: AMD Radeon R9 200 Series
Renderer: Direct3D11 (Hardware)
Interlacing: None
Enable FXAA
Texture Filtering: Ticked

SPU2-X r5830 2.0.0 [spu2-x-r5875]:
Interpolation: 3 - Hermite (better highs)
Module: 2 - DirectSound (nice)

Emulation Configurations:
EE/IOP:
EmotionEngine: Recompiler
IOP: Recompiler
Round Mode: Chop/Zero
Clamping Mode: Normal

VUs:
VU0: microVU Recompiler
VU1: microVU Recompiler
Round Mode: Chop/Zero
Clamping Mode: Normal

GS:
Disabled Framelimiting: Unchecked
Base Frame adjust: 100%
Slow Motion Adjust: 50%
Turbo Adjust: 200%

Frame Skipping:
Disabled
2 Frames to Draw
2 Frames to Skip

GS Window:
Aspect Ratio: Widescreen (16:9)
Custom Window Size: 1600x900 (but adjusts to 1584x850 once emulation begins)
Dynamically oggle vsync depending on frame rate: ticked

Game I am trying to play:
Kingdom Hearts

[willkuer]

Use fastboot instead of fullboot.
What input source did you select in cdvd top menu? Iso?

[TheCalcium]

I do use fastboot. And yes I do use iso.

[refraction]

How did you make your ISO?
did you just pull the .img file off the disc/copy the disc contents, or did you use a tool like imgburn to make the iso?

[TheCalcium]

Yeah I was originally using poweriso and just pulling the contents off the disk. I just tried using imgburn to create the iso and its working flawlessly now.