OS X Lion won't let me resize partitions

I've install OS X Lion a different partition successfully. After realizing that I loved Lion I wanted to downsize my Snow Leopard partition I succesfully do that but now it won't let me expand my Lion partition!
HELP!!!! PLEASE!!!!

I had the same problem too. I had upgraded Snow Leopard to Lion, but then found out some of my apps would not run in Lion. So i created another partition and installed Snow Leopard on it so I could dual boot between Lion and Snow Leopard. The problem was that I didn't leave enough room on my Lion partition to work with some video editing I was doing. So I tried to enlarge my Lion partition and reduce my Snow Leopar partition but had no success.
I thought that if I deleted my Snow Leopard partition that I would be able to resize my Lion partition to use the entire drive. That didn't work.
So I tried to boot from the Lion Recovery Partition, but when I tried to apply the changes of resizing my Lion partition it would fail withe a message that it couldn't unmount the drive.
But here is what I did that FINALLY worked (and this was while booted into my normal Lion partition):
Enter the following command into Terminal
defaults write com.apple.DiskUtility DUDebugMenuEnabled 1
Open Disk Utility
Now there is a DEBUG menu at the top. Go DEBUG and select SHOW EVERY PARTITION
Now you will see the RECOVERY HD partition under your LION partition.
Select the RECOVERY HD partition and click MOUNT at the top
Now you can expand your LION partition
My guess is that since Disk Utility couldn't see the hidden recovery partition and since that partition is physically AFTER the Lion partition it could not resize. But by mounting the hidden Recover Partition, then Disk Utility was able to move the Recovery Partition and expand the Lion partition.
Now I just need to create a partian to reinstall snow leopard into ( I will make it smaller this time so I have more room on my Lion partition).
Hope this helps.
And here's a link to the article I used to find out how to show the hidden partion:
http://reviews.cnet.com/8301-13727_7-20081463-263/manage-all-partitions-with-dis k-utility-in-os-x/

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/dev/disk0   #:                       TYPE NAME                    SIZE        IDENTIFIER
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   1:                                           EFI                         209.7 MB     disk0s1
   2:                         Apple_HFS Macintosh HD            78.5 GB     disk0s2
   3:                       Apple_Boot Recovery HD             650.0 MB     disk0s3
   4:                   Microsoft Basic Data                         31.7 GB      disk0s4
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gpt show: disk0: Pri GPT at sector 1
gpt show: disk0: Sec GPT at sector 234441647
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          1          1                             Pri GPT header
          2         32                            Pri GPT table
         34          6
         40     409600           1            GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
     409640 153240016      2            GPT part - 48465300-0000-11AA-AA11-00306543ECAC
153649656    1269544     3            GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
154919200   17628896
172548096   61892608    4            GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
234440704        911
234441615         32                       Sec GPT table
234441647          1                        Sec GPT header
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1: EE    0   0   2 - 1023 254 63 [         1 - 172548095] <Unknown ID>
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3: 00    0   0   0 -    0   0   0 [         0 -          0] unused
4: 00    0   0   0 -    0   0   0 [         0 -          0] unused
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BSD: not present
APM: not present
GPT: present
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Recovery/transformation command (? for help): h
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Creating entry for GPT partition #4 (MBR partition #2)
Enter an MBR hex code (default 07):
Set the bootable flag? (Y/N): y
Unused partition space(s) found. Use one to protect more partitions? (Y/N): n
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bobwild wrote:
My Time Machine is a 400GB partition of a 1 TB external HD. There is another 600GB partition that is empty. In Disk Utility I was expecting a dot/divider between the two partitions so that I could resize them. It is not there
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OS X Lion won't let me resize partitions

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