ime faild

i am trying to rebuilt ime qmobile a900 but faild

Action : Repair IMEI
1.Remove Battery, Insert usb cable, Insert battery
2.power off Phone, Remove & Reinsert Battery , insert USB Cable
(In Case Some Phone Required to hold bootkey)
Waiting for Phone Usb…
Phone found [ USB Port:COM43 ]
Connection Done.
Read CPU Info…
CPU_ID: 6583
CPU_SW: 0001
uploading boot image to RAM…
Handshake received from Phone.
Detected eMMC FlashType.
Warning: failed to init dram, loading default settings
Waiting for DRAM detection…
Done. Size=0x0000000020000000
uploading boot image to RAM…
Handshake Received from Phone.
eMMC cid: FE014E503058585858
CHIP : MT65830000
EMMC ID : FE014E503058585858
EMMC Size: 4GB, usable capacity: 3.64GB
EMMC Name: eMMC_Micron_MT29PZZZ8D4WKFEW_18W_6D4
Read Hardware Information is done.

Checking imei …

Error: failed to read partition table.
Error: Rebuild IMEI [0x4B]

Action completed
Time taken : 00:00:21
Reconnect Battery/USB Cable
CS-Tool Ver 1.38.15