samba - Dec 2011 - How to access Windows cluster Server 2008 R2 using smblcinet

Hi,
I'm using smbclient to get list of shares exported in a cluster server 2008
R2.
I'm not getting the share list. Instead I'm getting list of local
drives.(C$ to Z$).

I'm connecting to server using IP address(given by nslookup) NOT by cluster
name.
and I'm processing dirents of SMBC_FILE_SHARE type.

Am I missing anything here?
Can I connect to the server by name instead of IP address?

thanks in advance
-Kishore