在自己部署了一个实现erc20的代币合约后，我想要新建一个合约对其进行转账，结果失败，我想是不是授权的问题？比如导入其它的erc20的token合约也是如此。使用了SafeERC20。

pragma solidity >=0.6.1<0.9.0;
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
contract testErc20 is Ownable{
    using SafeERC20 for IERC20;
    address public erc20TestToken=0x423C14e857Ad05E9c76672b00942AF1CDA95d330;
    IERC20 private targetERC20Contract = IERC20(erc20TestToken);
    address public contractMatser;
    //一个合约最多有一个 receive 函数，receive 接收以太函数，（通常是对合约转账）
    receive() external payable { }
    //检查发起者持有多少Token
    function balanceOf(address eoaAddress)public view returns(uint256){
        return targetERC20Contract.balanceOf(eoaAddress);
    }
    //0xaE67336f06B10fbbb26F31d31AbEA897290109B9
    //0x986f2707BD30A9926D17F624b5497c178DAE51D5
    //授权
    function approveSend(address toAddress, uint256 amount)public{
        require(balanceOf(msg.sender)>=amount,"SendAddress haven't a token!");
        targetERC20Contract.safeApprove(toAddress, amount);
    }
    //转账
    function sendToken(address from,address to,uint256 amount)public payable{
        require(balanceOf(from)>0,"From address haven't a token!");
        targetERC20Contract.safeTransferFrom(msg.sender, to, amount);
    }
}