I tried the
NET USE z:\\mylinuxserver\data passw0rd /user:mylinuxserver\tina /persistent:no
but it still says
Multiple connections to a server or shared resource by the same user, using more than one user name, are not allowed. Disconnect all previous connections to the server or shared resource and try again..

Do you have to use these after a reboot of the pc? I can't find any connections or shares on the pc to disconnect and smbstatus shows none.