libusb on Mac OS 10.4.9

I got the following message when I plug a Sandisk e280 into the USB  
port on my PBG4 running on Mac OS 10.4.9

AppleUSBEHCI[0x1f34000]::Found a transaction which hasn't moved in 5  
seconds on bus 85, timing out!

Sometimes the e280 connects succesfully with the mac, sometimes it  
does not and I get the USB error message.

Is there any way to solve the problem?

Thanks

Jean

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