Mounting Reiserfs partition

I just bought a new hard disk, made partitions with fdisk, and formatted it using mkreiserfs. I edited /etc/fstab for that partition: /dev/hdb1 /data reiserfs defaults,user 0 0 I can mount it just fine, but I can't write a single byte to the partition as a user. I'm obviously missing something here, but I don't know what. What else do I have to add to this line so I can write to the partition as user. Thanks in advance.