i’m trying to add liquidity in uniswap v2 router from a solidity smart contract, but it seems to fail even though the allowance have been given.

pragma solidity ^0.8.0;

import "./IUniswapV2Router01.sol";
import "./IERC20.sol"; // Import ERC20 interface if needed

contract MyContract {
    IUniswapV2Router01 public uniswapRouter;
    address public tokenAddress;
    
    constructor(address _router, address _tokenAddress) {
        uniswapRouter = IUniswapV2Router01(_router);
        tokenAddress = _tokenAddress;
    }
    
    function addLiquidityETH(uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, uint deadline) external payable {
        // Approve the router to spend the token on behalf of this contract
        IERC20 token = IERC20(tokenAddress);
        token.approve(address(uniswapRouter), amountTokenDesired);
        
        // Call addLiquidityETH function
        uniswapRouter.addLiquidityETH{value: msg.value}(
            tokenAddress,
            amountTokenDesired,
            amountTokenMin,
            amountETHMin,
            address(this),
            deadline
        );
    }
}

Can someone explain me what’s the mistake i’m doing ? Or could help me with the actual solidity code to call addLiquidityETH function in uniswapv2router.