External Firewire Drives not mounting but shown in Disk utlilty

Well the title says it all!
I can see my ibook in target mode on my new macbook in disk utlity but not in finder!
I want to copy over my documents folders (I have tried migration assistant but it can't see the mounted drive either!).
It works fine the other way (i.e viewing the macbook in target mode on the ibook)
Details:
Macbook 2.2GHz (new model) 10.5.1
Help!

Is the Mount or Unmount button greyed out in DU when you highlight the Firewire icon? If you can click the Mount one, do so. If you can click the Unmount one, check the Prefs in the Finder menu to make sure that you are showing attached drives.

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    May 25 22:05:00 localhost com.apple.launchd[1]: *** launchd[1] has started up. ***
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    May 25 22:06:15 localhost com.apple.locationd[40]: STACK,Time,359690775.485,1   locationd                           0x00000001077fe583 locationd + 624003
    May 25 22:06:15 localhost com.apple.locationd[40]: STACK,Time,359690775.485,2   locationd                           0x00000001077fe719 locationd + 624409
    May 25 22:06:15 localhost com.apple.locationd[40]: STACK,Time,359690775.485,3   libdispatch.dylib                   0x00007fff85f46c79 _dispatch_barrier_sync_f_invoke + 33
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    May 25 22:06:15 localhost com.apple.locationd[40]: STACK,Time,359690775.485,6   libsystem_c.dylib                   0x00007fff85e96e06 pthread_once + 86
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    May 25 22:06:15 localhost com.apple.locationd[40]: STACK,Time,359690775.485,11  locationd                           0x00000001077f3509 locationd + 578825
    May 25 22:06:15 localhost com.apple.locationd[40]: STACK,Time,359690775.485,12  locationd                           0x00000001077b052a locationd + 304426
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    May 25 22:06:15 localhost com.apple.locationd[40]: STACK,Time,359690775.485,16  locationd                           0x00000001077c332c locationd + 381740
    May 25 22:06:15 localhost com.apple.locationd[40]: STACK,Time,359690775.485,17  locationd                           0x0000000107767fd8 locationd + 8152
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