cifsmount errors on second mount

[bfrench]

I have two mounts from one windows server. The first works fine using the cifsmount information as supplied above.

cifsmount //:/ /mnt1 -U (username) -P (password)

When I try to mount the second share with the same command I get to following errors.

cifsmount //:/ /mnt1 {options} -U (username) -P (password)
SRV: Invalid netname

I can mount the second share without username and password:
cifsmount //:/ /mnt1

But when I try to cifslogin to it I get the following errors.

LOC: Netbios name lookup failure
LOC: Netbios name lookup failure