question about TSM 4.1.3 v.s LTO 3581

I upgraded my TSM server from 4.1 to 4.1.3  and I attached LTO 3581 to TSM
4.1.3
I encountered problems in restore my files.

(1.)
There was nothing happened after I entered restore command .
I use " q act " and I got the log as follows:
  GENDRV_TAPE0 (\\.\TAPE0)  is in use
I use " q mount " and I got the log as follows:
        ANR8329I LTO volume TP1 is mounted R/W in drive GENDRV_TAPE0
(\\.\TAPE0), status: IDLE.
        05/21/2001 19:28:30   ANR8334I   1 volumes found.
I use " dismount  TP1" and I got the log as follows:
        ANR8499I Command accepted.
        ANR2017I Administrator ADMIN issued command: QUERY ACTLOG
        ANR8376E I/O error on drive GENDRV_TAPE0 (\\.\TAPE0)
                       (OP=LOCATE, Error Number=21,  CC=0, KEY=02, ASC=04,

                       ASCQ=02,
SENSE=70.00.02.00.00.00.00.1C.00.00.00.00.04.0-
                       2.00.00.10.12.00.00.00.00.00.00.00.00.00.00.00.00.FF.
FF-

.FE.FB.05.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.-

00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-
                       0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.
00-
                       .00.00.00.00.00.00.00.00.00, Description=An
undetermined
                       error has occurred).  Refer to Appendix D in the

                       'Messages' manual for recommended action.

        ANR9999D pvrntp.c(1825): Error writing EOT to NTP volume  TP1.

If I close the GUI after I backup or restore , I won't get the error again.
What does it mean ?

(2.)
In TSM server 4.1 , I can see the library volume after I label it , no
matter I use command line or server utility .
In TSM server 4.1.3 , I have to enter the command " CHECKIN libvol lb4.0.0.5
search=yes status=scratch " to check it in.
Why ?  Why ? Why ? Did I do something wrong ?

                                                                Michael Shu