Keep getting access denied when trying to connect to Samba share

I have a Linux machine that I use as a home server. I know the username and password are the same as on my Win7 Ultimate x64 PC. I can see all the shares, but when I try to connect, using Windows Explorer, and enter the password, it continuously tells me "Access Denied". (See attachment) I also use SyncToy to keep files backed up, and that program has no problem connecting and transferring...