Problems recording external inputs

My setup: Mac Pro dual 2.66 GHz, 5G Ram, OS 10.5.5, LogicPro 7.2.3; Yamaha 01x interface conn. to Mac w/ mLan Firewire; Yamaha Motif Classic conn. to 01x w/ line inputs; Fantom XR Rack conn. to Mac w/Digital Coaxial; 2 Event TR8 Monitors conn. w/ unbalanced RCA from 01x monitor outs. I store all my Logic files on an external Firewire hard drive which has at least 2 Gigs of space remaining. Neither the Motif or Phantom are connected to the 01x w/ MIDI.
I was previously running Logic 7.2.3 w/ my 01x, Motif and Fantom w/ a Mac G5 Dual running OS 10.4. I just bought a brand new Mac Pro preloaded w/ OS 10.5.5. I migrated LogicPro from my old hard drive to the new one and downloaded the latest mLan AutoConnector driver from Yamaha.
PROBLEM: When I arm my Motif or Fantom to record (each 1 at a time), and play notes, a popping sound occurs every 20 seconds or so. When I record the signal, the popping noise can be heard on playback. I am sure my patch input settings are correct. I have tried using both mLan ports on the 01x, switched out monitor cables, as well as my motif input cables - same problem. When I monitor the 01x, the motif input comes through as normal w/ no popping, so I know my cables and physical mixer inputs are good. When I play previously recorded files, everything comes through fine as well.
What could possibly be the problem?

My problem appears to have been solved. When I was hearing the clicks and pops, the mLan cable from my 01x was connected to the Firewire 400 port on the FRONT of my MacPro. I connected it to the Firewire 400 port on the back of the MacPro, and no more pops.
I thought I had tried this before and it didn't work, but it seems to be working fine now.

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Valery : I personally checked by doing the example, if the names of value attribute are different in the child's interface and parents component controller then it throws the exception.
Sourav: NullPointer Exception is thrown when something is not properly initialised, if in the main component the cardinality of mapped origin is 1.1 then you need to access it element directly like:
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can not select external input for sound

Hey there RoosterMonkey,
It sounds like you have Soundtrack Pro installed but you cannot select your external audio device as an input. I recommend the troubleshooting steps from the article named:
Soundtrack Pro 3: Troubleshooting Basics
http://support.apple.com/kb/ht3659
Update to the latest software versions
From the Apple () menu, choose Software Update and make sure that you have the most recent updates for your versions of Soundtrack Pro 3, QuickTime, Compressor, Pro Application Support, and other important system files. Installing the latest updates ensures that your software has the latest improvements and enhancements.
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In the Finder, choose Go > Go to Folder from the menu.
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