External Accessory Detection Issue

I have an external accessory (Ingenico iSMP EFTPOS) that plugs into the iPhone 4S here using the 30pin connector. I have 7 other phones that work well, but this one does not, it can't talk to the accessory at all.
I can see it's detecting it but I'm unsure why it doesn't know what it is. I've singled out a few items from the device log that might give it away, perhaps a damaged 30pin connector or controller attached to it.
Thoughts? This first entry has me concerned it might be a port or controller fault in the iPhone but I can't find any documentation on the error code. Scroll to the bottom to see the accessory not being recognised, on normal devices those fields in AccessoryInfo are all filled in with the device details.
Sep 3 11:25:45 iapd[120] <Warning>: ERROR - /SourceCache/iapd/iapd-1386.10.43/iapd/IAPPortManager.mm:-[IAPPortManager availableCurrentFromAccInMa] - 228 IOAccessoryManagerGetUSBCurrentLimitBase failed 0xe00002d9
Sep 3 11:25:45 backboardd[28] <Notice>: MultitouchHID: device bootloaded
Sep 3 11:25:45 backboardd[28] <Notice>: MultitouchHID: detection mode: 6->6
Sep 3 11:25:45 kernel[0] <Debug>: ALS: AppleARMBacklight::handleMessageGated - framebufferState -> 1
Sep 3 11:25:45 kernel[0] <Debug>: ALS: AppleARMBacklight::setBacklightEnableGated 1 (set level to 0x4da)
Sep 3 11:25:54 kernel[0] <Debug>: AppleMultitouchN1SPI: updating power statistics
Sep 3 11:25:54 backboardd[28] <Notice>: ALS: SetDisplayFactor: factor=0.0000
Sep 3 11:25:54 SpringBoard[34] <Warning>: [MPUSystemMediaControls] Disabling lock screen media controls updates for screen turning off.
Sep 3 11:25:54 backboardd[28] <Notice>: MultitouchHID: detection mode: 6->255
Sep 3 11:25:54 kernel[0] <Debug>: ALS: AppleARMBacklight::setBacklightEnableGated 0 (set level to 0x1f7)
Sep 3 11:25:54 backboardd[28] <Notice>: Posting 'com.apple.iokit.hid.displayStatus' notifyState=0
Sep 3 11:25:54 SpringBoard[34] <Warning>: [MPUNowPlayingController] Not registered for now playing notifications. Ignoring call to -unregisterForNotifications.
Sep 3 11:25:55 kernel[0] <Debug>: ALS: AppleARMBacklight::handleMessageGated - framebufferState -> 0
Sep 3 11:27:22 CommCenter[69] <Notice>: Telling CSI to go low power.
Sep 3 11:27:22 powerd[48] <Notice>: Sleep: Using BATT (Charge:87%)
Sep 3 11:27:22 powerd[48] <Notice>: PM scheduled RTC wake event: WakeImmediate inDelta=727.27
Sep 3 11:27:22 CommCenter[69] <Notice>: Telling CSI to exit low power.
Sep 3 11:27:22 powerd[48] <Notice>: DarkWake to FullWake [CDNVA] : Using BATT (Charge:87%)
Sep 3 11:27:22 UserEventAgent[14] <Warning>: Could not get wake reason (errno: 2)
Sep 3 11:27:22 powerd[48] <Notice>: Kernel: Response from powerd is to cancel state change (powercaps:0x0)
Sep 3 11:27:22 aggregated[39] <Warning>: Error: Could not get wake reason (errno: 2)
Sep 3 11:27:22 CommCenter[69] <Notice>: Release assertion for reason: operation queue is empty
Sep 3 11:27:23 kernel[0] <Debug>: PM notification cancel (pid 48, powerd)
Sep 3 11:27:23 kernel[0] <Debug>: IOPMrootDomain: idle revert
Sep 3 11:27:25 iapd[120] <Warning>: /SourceCache/iapd/iapd-1386.10.43/iapd/EAManager.mm:-[EAManager _takeClientAssertionsForAccessoryConnection]-1607 client (null)
Sep 3 11:27:25 iapd[120] <Warning>: /SourceCache/iapd/iapd-1386.10.43/iapd/EAManager.mm:-[EAManager _takeClientAssertionsForAccessoryConnection]-1607 client com.apple.Preferences
Sep 3 11:27:25 iapd[120] <Warning>: AccessoryInfo = {
Sep 3 11:27:25 iapd[120] <Warning>:     IAPAppAccessoryNameKey = ;
Sep 3 11:27:25 iapd[120] <Warning>:     IAPAppAccessoryManufacturerKey = ;
Sep 3 11:27:25 iapd[120] <Warning>:     IAPAppAccessoryModelNumberKey = ;
Sep 3 11:27:25 iapd[120] <Warning>:     IAPAppAccessoryFirmwareRevisionKey = ;
Sep 3 11:27:25 iapd[120] <Warning>:     IAPAppAccessoryHardwareRevisionKey = ;
Sep 3 11:27:25 iapd[120] <Warning>: } // End AccessoryInfo

Thank you for your reply. The drive does come up in the Disk Utility after I reboot and connect the cable. You can click on the hard drive in Disk Utility and it indicates the volume (drive size). If you try to partition the drive the spinning wheel displays and it doesn't appear to do anything but lock up Disk Utility and it needs a Force Quit to close. Disk Utility displays the drive as 232.9 GB LaCie Group SA and below that text it says disk3s3 and is greyed out. I have tried to erase and partition the drive but the Disk Utility locks up. Is there a way to get disk back to its original factory install condition so I may attempt to format it? Is there a UNIX disk utility that could force an erase and partition? Thanks for your help.

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I am a volunteer and neither a Lenovo nor a Microsoft employee. • Dexter is a good dog • Dexter je dobrý pes
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