I can't flush data and amstatus reports 0% data.

I got a server that someone forgot to load the tapes in.
So, the holding disk growed to 100%. Then I came to make
some flushing of the data. There are a lot of days
waiting to be flushed. One of them I thought it didn't
fit in the tape, so I wanted to skip it and try to flush
it later.
There were [A..P], and I typed this: B C D and so on

But when I check the amstatus it displays like this:

Using /var/lib/amanda/Daily/amflush


SUMMARY          part     real estimated
                          size      size
partition       :   0
estimated       :   0                  0k
flush           :   0        0k
failed          :   0                  0k           (  0.00%)
wait for dumping:   0                  0k           (  0.00%)
dumping to tape :   0                  0k           (  0.00%)
dumping         :   0        0k        0k (  0.00%) (  0.00%)
dumped          :   0        0k        0k (  0.00%) (  0.00%)
wait for writing:   0        0k        0k (  0.00%) (  0.00%)
wait to flush   :   0        0k        0k (100.00%) (  0.00%)
writing to tape :   0        0k        0k (  0.00%) (  0.00%)
failed to tape  :   0        0k        0k (  0.00%) (  0.00%)
taped           :   0        0k        0k (  0.00%) (  0.00%)
all dumpers active
taper idle

That wasn't the usual status flushing report at all.
I stopped it, run amclear and tried again. Now I only
asked it to flush one day.
It happens the same.

How can I clean this mess ? Thank you .