NAS Access

Hello newbie here so thanks in advance

I have Windows 8 on a PC and I also have a WD MY Clous NAS I am the only user A/C on the PC I can use the Nas no problem read and write files etc

But If I put a password on my A/C when the PC wakes up and ask for password I enter it and get to start screen and open file explorer click on NAS and I cannot access it it asks for a network password If I put in my user A/C Password it tells me its the wrong password

If I take the Password off my User A/C everything goes back to normal and i can access the nas again no problem this has me perplexed can anyone help please

thanks mylesm