I did all steps, now my client is 0.3.10 and it stopped at block 74638. Is all fine?
If you still show 74638 blocks then you aren't connected to any 0.3.10 nodes. For today, try adding these parameters:
-addnode=75.158.131.108 -addnode=99.27.237.13 -addnode=68.68.99.14
See
http://bitcointalk.org/index.php?topic=828