[solved] dll not loading. LoadLibrary returns 0

I built this code to transform an image memory into input for an AI model.
The code generates the DLL. If I look at the DLL with DLLEXP, everything is fine. But
when I try to load it with LoadLibrary, it returns 0, which means it's failing.
I load a lot of libraries this way, and I don't see why it's not working.
There's something I'm missing...this is the first time I've made a DLL with fasm.

This is the code

Code:

format PE64 DLL
entry DllMain
include 'include/win64a.inc'

;--------------------------------------------------------------------
section '.code' code readable writeable
 
proc DllMain hinstDLL,fdwReason,lpvReserved
        mov rax, TRUE
        ret
endp

; Convención de llamada Microsoft x64 Fastcall
; rcx: const int32_t* input
; rdx: float* output
Int32ToFloat32RGB:
    push rbp
    mov rbp, rsp
    sub rsp, 48    ; Reservar espacio para la "home" del registro y la alineación de 16 bytes

    mov r8, rdx
    add r8, 409600 * 4         ; r8 = puntero para g_channel
    mov r9, rdx
    add r9, 2 * 409600 * 4     ; r9 = puntero para b_channel
    
    vmovups ymm2, [mask_ff]
    vmovups ymm3, [inv_255_f32]

    ; Bucle principal, procesa 8 valores a la vez (409600 / 8 = 51200 iteraciones)
    mov rcx, 51200
    
.loop:
    vmovups ymm0, [rcx]

    ; --- Canal R ---
    vpand ymm1, ymm0, ymm2
    vcvtudq2ps ymm1, ymm1
    vmulps ymm1, ymm1, ymm3
    vmovups [rdx], ymm1

    ; --- Canal G ---
    vpsrlw ymm4, ymm0, 8
    vpand ymm1, ymm4, ymm2
    vcvtudq2ps ymm1, ymm1
    vmulps ymm1, ymm1, ymm3
    vmovups [r8], ymm1

    ; --- Canal B ---
    vpsrlw ymm4, ymm0, 16
    vpand ymm1, ymm4, ymm2
    vcvtudq2ps ymm1, ymm1
    vmulps ymm1, ymm1, ymm3
    vmovups [r9], ymm1

        add rdx, 32
        add r8, 32
        add r9, 32
        sub rcx, 32   ; 8 * 4 bytes
        jnz .loop
    
    add rsp, 48
    pop rbp
    ret
 
;--------------------------------------------------------------------
section '.data' data readable writeable
    align 32
    mask_ff: dd 0x000000FF, 0x000000FF, 0x000000FF, 0x000000FF, 0x000000FF, 0x000000FF, 0x000000FF, 0x000000FF
    inv_255_f32: dd 0x3d7fbe77, 0x3d7fbe77, 0x3d7fbe77, 0x3d7fbe77, 0x3d7fbe77, 0x3d7fbe77, 0x3d7fbe77, 0x3d7fbe77

section '.edata' export data readable

        export 'memavx.dll',\
        Int32ToFloat32RGB, 'Int32ToFloat32RGB'

section '.reloc' fixups data readable discardable
    if $=$$
        dd 0,8
    end if