Hi guys.
Im making masternode but got stuck at step 7, click Start and an error showed: could not allocate vin for collateralAddress.
I followed every step as quick step on website.

Quick instructions to start

1) Start the wallet, go to “PhaNtomXNodes” menu item, and you will be presented with all running masternodes.
2) Click on “My PhaNtomXNodes” tab, then click on “Create” button to start creating your masternode.
3) A window will popup. Name your masternode in “Alias” field. In “Address” field type your external address:port
4) Click on button “Copy Address” and send 20000 PNX to that address. Wait 1 conformation then proceed with setup. Collateral address is your own address.
5) Go back to “PhaNtomXNodes” menu, select your PhaNtomX masternode and click button “Get Config”.
6) You must create a file named phantomx.conf. Paste the masternode config you copied before. Go to PhaNtomX folder and place it.
7) Select your PhaNtomX masternode and click button “Start”. Then restart the wallet.

It didnot work for me.  Any idea where I made a mistake?
external address and port I took here: http://www.nirsoft.net/show_my_ip_address.php