I am trying to call the create_associated_token_account function in my solana program. but I can't figure out what I am doing wrong.

pool_address = PDA account
tokenx_mint  = token mint address
last_ata     = same with my_ata_address, comes from the transaction accounts. 
token_program = token program 

let my_ata_address = spl_associated_token_account::get_associated_token_address(
                &pool_address, 
                tokenx_mint.key
            );
            
            invoke(&spl_associated_token_account::instruction::create_associated_token_account(
                    &my_ata_address, 
                    &pool_address, 
                    tokenx_mint.key, 
                    token_program.key
                ), &[
                    last_ata.clone(),
                    pool_account.clone(),
                    token_program.clone(),
                    tokenx_mint.clone()
                ]
            )?;

I add this to the keys array in my client (I was planning to make it dynamic another time):

{
                pubkey: new PublicKey("GENERATED_TOKEN_ATA_ADDRESS"),
                isWritable: true,
                isSigner: false
            }```

I am trying to call the create_associated_token_account function in my solana program. but I can't figure out what I am doing wrong.also when I run my program with my client, I get the error "invalid account data for this instruction"

pool_address = PDA account
tokenx_mint  = token mint address
last_ata     = same with my_ata_address, comes from the transaction accounts. 
token_program = token program 

let my_ata_address = spl_associated_token_account::get_associated_token_address(
                &pool_address, 
                tokenx_mint.key
            );
            
            invoke(&spl_associated_token_account::instruction::create_associated_token_account(
                    &my_ata_address, 
                    &pool_address, 
                    tokenx_mint.key, 
                    token_program.key
                ), &[
                    last_ata.clone(),
                    pool_account.clone(),
                    token_program.clone(),
                    tokenx_mint.clone()
                ]
            )?;

I add this to the keys array in my client (I was planning to make it dynamic another time):

{
                pubkey: new PublicKey("GENERATED_TOKEN_ATA_ADDRESS"),
                isWritable: true,
                isSigner: false
            }```