External drive reverts to read-only on airport extreme

I have an external drive that works fine (full access read/write) when connected directly to my Macbook but reverts to read-only when I connect to it through my airport extreme.  It also won't let me change the permisssions over the network.  I have another drive used for Time Capsule connected to the Airport Extreme and it works fine, as well as the printer.  The problem drive is formatted OS X extended (journaled).

Nicky McCatty wrote:
Earlier this morning my external drive, a Western Digital Firewire 800 1TB, was behaving normally. I shut my MacBook Pro down, and took it out for two hours. When I returned, Time Machine reported that my drive appeared to be read-only. I see that BOTH of my external Firewires now show up as read-only.
What causes this to happen, and what can I do about this problem?
A number of things. Most common is probably a power loss; second is probably disconnecting without first ejecting.
It's not permissions; try running +*Repair Disk+* on them, per #A5 in Time Machine - Troubleshooting (or use the link in *User Tips* at the top of this forum).

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    Message was edited by: HeatherK

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