426 Connection closed: insufficient systemsources

[Bimes]

Hi,

I am using ioftpd for a long time now, but yesterday when i tried to upload something i got this error:
426 Connection closed: Er zijn onvoldoende systeembronnen beschikbaar om aan de aanvraag te voldoen.
And it means somehing like:
426 Connection closed: insufficient systemsources available to fill you're request.

I got this error when i try to upload something.
THis is the whole log from 1 uploaded file:
[R] PASV
[R] 227 Entering Passive Mode (**,***,194,188,110,242)
[R] Opening data connection IP: **.**.***.* PORT: 28402
[R] STOR ***.r07
[R] 150 Opening BINARY mode data connection for ***.r07.
[R] 426 Connection closed: Er zijn onvoldoende systeembronnen beschikbaar om aan de aanvraag te voldoen.
[R] Transfer Failed!

This repeats itself a couple of times, and after that:
Transfer queue completed
1 File failed to transfer

I tried to change the threads and process_priority but it didn't work out...
Btw: it's only when i upload something to my ftp server, downloading works perfect (11 mb/s)

(yes i know it's a crosspost, but i think many people dont want to react to my other thread because it's in International Help: http://www.inicom.net/forum/showthread.php?t=11888)
thnx in advance

[helenoksen]

it sounds like your system might be running out of system resources, like hdd space or free ram.. try rebooting or something then try again, pz!

[Bimes]

done, still the same.
p4 2.4 gHz 1024 mb ram and 500 gig should be enough i think?