XFileSharing Pro - get error when upload big files

[hzfile]

hi.i upload small files <300 mb is ok
but when i upload big files > 300 mb, i get error
this is screenshot

what should i do now?
tks everyone very much!

[AnotherIdiot]

Check your uploader file size permissions. Try setting them all to 1000mb (1GB) and try uploading again.

Also check you have you have room on the file server.

Then check your cron.pl is running to clear symlinks and things