File transfer: AFP vs FTP

Setup:
Cable modem to Linksys WRT54g broadcasting only in G only mode for PBG4.
AEBSn#1 in bridge mode via Ethernet from Linksys, N only mode, broadcasting wirelessly.
AEBSn#2 is wirelessly extending N-only from AEBSn#1, and is connected to a mini with external hard drive.
Using PBG4, if I mount a volume from the mini and transfer a file, transfer time is very slow: approx. 20 minutes for a 200MB file. If I FTP from PBG4 into the mini, transfer time is 2 minutes.
(I think the same happens if I use a Macbook Pro connected to the N-only network, but it's in for repairs right now, so I can't be sure.)
Any idea why the transfer times are so different b/w AFP and FTP and, more importantly, what I can do to remedy this? Thanks.

Same problem here. I have two AEBS Gigabit in bridge mode. Transfering a file via FTP or with Apple Remote Access (ARD) brings up to 3 MB/sec. Same file and same configuration connected via AFP only brings 60 kB/sec.
I hope somebody has an idea how to fix this.
Thanks in advance

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