A – congratulations, you said the system joined the domain, but did your account authenticate? Are you able to login as a user in that domain?
B – you said you could print to the domain. How? Through ‘CUPS’ or text transfer to a network printer?
C – Next are you familiar with the command line and ‘Net’ commands? Will “Net Use’ let you map a share on a machine in the Domain? (Usually a share on the server.) What does “Net View” display?
D – At the ‘Command Prompt’ on a Windows system can you ping the Linux system? By name or just by ip address?
Samba is very powerful (suite of which ‘WindBind’ is part) but these questions help us find out what layer / level your problem is. Good luck and come back soon.