Newbie networking help

Hi There

I'm struggling to set up the following network;

MBP/i7PC both connected via ethernet via router.

MBP sees PC but connection denied.

PC doesn't see MBP but does see NAS/Printer/Router and any other PC that happens to be on the network.

MBP also sees NAS/Printer/Router and any other PC on the network.

Would appreciate any help or advice.

What version of Windows?

Do you have a login with the same name/password on both machines? (this seems to help)

Do you have Bonjour installed on the PC?

Do you have anything shared on the Mac?

Using Win7(64bit)

Installed Bonjour but didn't make any difference.

Do you have a login with the same name/password on both machines? (this seems to help)

If the above is not true. Do you have anything shared on the Mac to everyone? - i.e. System preferences -> sharing -> file sharing -> shared folders (some folder); users everyone -> read or read/write access?

Got everything shared to everyone read/write.

Also got windows sharing on.

Login details doesn't change the situation....

Found the problem!!

Wasn't using the correct user name when requested.

Thx for the help anyway.