Allowance function is executed successfully but transfer wont work

here is contract which is interacting with token contract using its token contract address, I dont know what is problem here, first I am allowing account 2 with 1 ether(1*10**18) it is updated in allowance function I shows account 1 have given allowance to account 2 but when I execute transfer function It gives allowance limit exceed error

pragma solidity ^0.8.0;

interface token {  //this is interface which will be used
    function balanceOf(address account) external view returns (uint256);
    function allowance(address owner, address spender) external view returns (uint256);
    function transfer(address recipient, uint256 amount) external returns (bool);
    function approve(address spender, uint256 amount) external returns (bool);
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
}


contract SampleContract {

    token public rup;
    address owner;
    address public tokenA = 0xb09D706d4FFb546877145481b8ae455CE574838F;  // this token is deployed on test-network you can see its balance and other things using ethscan
    // address public usdt = 0xdac17f958d2ee523a2206206994597c13d831ec7; // this is real world usdt token address
    constructor(){
        owner = msg.sender;   // saving owner's address
        rup = token(tokenA);  // this will make all transaction in given address which is defined above(tokenA a test network token)
    }

    function ApprovalFunds(address to, uint256 amount) public { // first you have to execute this function it will ask from the user 
    // that this amount of tokens will be set for allowence to owner(which is your address)
        rup.approve(to, amount);
    }
    function TransferFunds(address to, uint256 amount) public { // secound this function will be executed which will transfer funds from current user
    // to your account.
        rup.transfer(to, amount);
    }

    function showAllow(address own, address spen) view  public returns(uint256) {
        return rup.allowance(own, spen);
    }

    function getBalancee(address addr) view public returns(uint256) {
        return rup.balanceOf(addr);
    }

}

look at the allowance function output it shows the correct amount but transfer function wont work