Mapping a network drive

Hi, need a little help please. I have created a new share on my windows 2003 SBS server, i want to map this drive automatically so have added net use T: \\server\share name /y to the login script. My problem is this the logon script will not map the drive. I can however map the drive manually from my computer. when i run the login script in a command prompt i get the error message: Access Denied, So i checked permissions, made sure domain admins, and myself were given full access rights. the owner is administrator. From what i can see the permissions are the same as all the other shares currently in use. I must be missing something straight forward here but just cant see it. Thanks in advance.