No index records for disk for specified date

[pilro2010]

blue29:/usr/local/amanda/sbin # ./amrecover test2 -s blue29 -t blue29
AMRECOVER Version 2.6.0. Contacting server on blue29 ...
220 blue29 AMANDA index server (2.6.0) ready.
Setting restore date to today (2011-10-18)
200 Working date set to 2011-10-18.
200 Config set to test2.
200 Dump host set to blue29.
Use the setdisk command to choose dump disk to recover
amrecover> sethost blue29
200 Dump host set to blue29.
amrecover> listdisk
200- List of disk for host blue29
201- /nas/back
200 List of disk for host blue29
amrecover> setdisk /nas/back
200 Disk set to /nas/back.
No index records for disk for specified date
If date correct, notify system administrator

amanda.conf :
org "amanda"
dumpcycle 30
runspercycle 2
tapecycle 3
runtapes 1
dumpuser "amanda"
tpchanger "chg-disk"
tapedev "file:/nas/amanda_3/c/space/vtapes/test2/slots"
changerfile "/mnt/backup/amanda/var/lib/amanda/test2/changerfile"
labelstr "TEST2-.*"
tapetype DVD_SIZED_DISK
logdir "/mnt/backup/amanda/var/lib/amanda/test2"
infofile "/mnt/backup/amanda/var/lib/amanda/test2/curinfo"
indexdir "/mnt/backup/amanda/var/lib/amanda/test2/index"
tapelist "/mnt/backup/amanda/var/lib/amanda/test2/tapelist"

define dumptype full {
program "GNUTAR"
compress none
estimate calcsize
index yes
record yes
strategy noinc
holdingdisk no
tape_splitsize 133MB
}

...

blue29:/mnt/backup/amanda/var/lib/amanda/test2 # ls -altotal 92
drwxr-xr-x 4 amanda disk 456 Oct 18 11:01 .
drwxr-xr-x 5 root root 120 Oct 17 14:08 ..
-rw------- 1 amanda disk 12291 Oct 18 11:01 amdump.1
-rw------- 1 amanda disk 12385 Oct 17 19:56 amdump.2
-rw------- 1 amanda disk 12371 Oct 17 18:51 amdump.3
-rw------- 1 amanda disk 11967 Oct 17 11:25 amdump.4
-rw------- 1 amanda disk 2 Oct 18 11:00 changerfile-access
-rw------- 1 amanda disk 2 Oct 17 19:56 changerfile-clean
-rw------- 1 amanda disk 2 Oct 18 11:00 changerfile-slot
drwxr-xr-x 3 amanda disk 72 Oct 17 11:25 curinfo
drwxr-xr-x 3 amanda disk 72 Oct 17 11:25 index
-rw------- 1 amanda disk 958 Oct 18 11:01 log
-rw------- 1 amanda disk 87 Oct 18 11:00 tapelist
-rw------- 1 amanda disk 32 Oct 17 11:25 tapelist.amlabel
-rw------- 1 amanda disk 87 Oct 18 11:00 tapelist.yesterday

blue29:/mnt/backup/amanda/var/lib/amanda/test2/index/blue29/_nas_back # ls -altotal 16
drwxr-xr-x 2 amanda disk 232 Oct 18 11:15 .
drwxr-xr-x 3 amanda disk 80 Oct 17 11:25 ..
-rw------- 1 amanda disk 90 Oct 17 19:56 20111016195630_0.gz
-rw------- 1 amanda disk 284 Oct 17 11:32 20111017112541_0.gz
-rw------- 1 amanda disk 90 Oct 17 18:51 20111017185131_0.gz
-rw------- 1 amanda disk 90 Oct 18 11:00 20111018110053_0.gz
-rw-r--r-- 1 amanda disk 0 Oct 17 11:25 info


Both server and client are in the same PC.Is there anything i can have a look for troubleshooting? Please give me some advice。
Best Regards！