Cannot access shared external drive on iMac from Windows 7

Used to be able to access this drive with no problem from any of my PC's. Sent iMac in for repair and system drive was wiped so I'm starting from clean install of Leopard. Did all the updates first including 10.6.4 which wasn't on before the system drive died.


Firewall is off

SMB is on

Everyone as well as main user has read write access to external drive

iMac is in the same workgroup as machine, although it wasn't before and it worked fine.

PC can ping the IP of the iMac and get a response, can see the iMac in list of networked computers
but cannot access anything on it.

Windows 7 network diagnostics says "file and print sharing resource (JMGIMAC) is online but isn't responding to connection attempts" "The remote computer isn't responding to connections on port 445



I've tried everything, any ideas

Josh