3750x doesn't boot after upgrade to version15

Due to a problem with POE+ i have tried to upgrade the IOS to Version15.0.2SE2, from 12.2.58. unfortunatly the Switch doesn't boot up anymore. It starts to decompress and install the IOS 2 Times, after the Second try it displays "unable to boot" and the switch goes in Bootloader-mode.
When i look at the version i See that bootloader is still the old version 12.2.58.
It seems that the bootloader doesn't geht upgraded and that's why the Switch can't Boot the new Image.
Is there anything i can do to Upgrade the bootloader seperatly?
It's a 3750X48PF-S
Many thanks
Andy

This is a stack of 2 switches, both have the same problem and they are still running old image (as V15 doesn't work)
cs156005#sh license
Index 1 Feature: ipservices
        Period left: 8 weeks 4 days
        License Type: Evaluation
        License State: Active, Not in Use, EULA not accepted
        License Priority: None
        License Count: Non-Counted
Index 2 Feature: ipbase
        Period left: Life time
        License Type: Permanent
        License State: Active, In Use
        License Priority: Medium
        License Count: Non-Counted
Index 3 Feature: lanbase
        Period left: 0 minute 0 second
cs156005#sh inventory
NAME: "1", DESCR: "WS-C3750X-48P"
PID: WS-C3750X-48PF-S , VID: V02 , SN: FDO1527P0J8
NAME: "Switch 1 - Power Supply 0", DESCR: "FRU Power Supply"
PID: C3KX-PWR-1100WAC , VID: V02L , SN: LIT15060D4H
NAME: "Switch 1 - FRULink Slot 1 - FRULink Module", DESCR: "FRULink 10G ST Module"
PID: C3KX-NM-10G       , VID: V01 , SN: FDO14350PDY
NAME: "GigabitEthernet1/1/3", DESCR: "1000BaseLX SFP"
PID: Unspecified       , VID:      , SN: PR04004346
NAME: "2", DESCR: "WS-C3750X-48P"
PID: WS-C3750X-48PF-S , VID: V04 , SN: FDO1649P24J
NAME: "Switch 2 - Power Supply 0", DESCR: "FRU Power Supply"
PID: C3KX-PWR-1100WAC , VID: V02L , SN: LIT16371ZBN
cs156005#sh version
Cisco IOS Software, C3750E Software (C3750E-UNIVERSALK9-M), Version 12.2(58)SE1, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2011 by Cisco Systems, Inc.
Compiled Thu 05-May-11 01:56 by prod_rel_team
ROM: Bootstrap program is C3750E boot loader
BOOTLDR: C3750E Boot Loader (C3750X-HBOOT-M) Version 12.2(53r)SE2, RELEASE SOFTWARE (fc1)
cs156005 uptime is 1 hour, 14 minutes
System returned to ROM by power-on
System restarted at 10:11:49 cet Tue Jul 9 2013
System image file is "flash:/c3750e-universalk9-mz.122-58.SE1/c3750e-universalk9-mz.122-58.SE1.bin"
This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.
A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html
If you require further assistance please contact us by sending email to
[email protected].
License Level: ipbase
License Type: Permanent
Next reload license Level: ipbase
cisco WS-C3750X-48P (PowerPC405) processor (revision A0) with 262144K bytes of memory.
Processor board ID FDO1527P0J8
Last reset from power-on
2 Virtual Ethernet interfaces
1 FastEthernet interface
104 Gigabit Ethernet interfaces
4 Ten Gigabit Ethernet interfaces
The password-recovery mechanism is enabled.
512K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address       : A4:93:4C:95:EC:00
Motherboard assembly number     : 73-12553-05
Motherboard serial number       : FDO162001GA
Model revision number           : A0
Motherboard revision number     : D0
Model number                    : WS-C3750X-48PF-S
Daughterboard assembly number   : 800-32727-01
Daughterboard serial number     : FDO16200KPU
System serial number            : FDO1527P0J8
Top Assembly Part Number        : 800-31324-02
Top Assembly Revision Number    : E0
Version ID                      : V02
CLEI Code Number                : COMJZ00ARB
Hardware Board Revision Number : 0x03
Switch Ports Model              SW Version            SW Image
*    1 54    WS-C3750X-48P      12.2(58)SE1           C3750E-UNIVERSALK9-M
     2 54    WS-C3750X-48P      12.2(58)SE1           C3750E-UNIVERSALK9-M
Switch 02
Switch Uptime                   : 1 hour, 14 minutes
Base ethernet MAC Address       : 44:03:A7:58:AC:80
Motherboard assembly number     : 73-12553-08
Motherboard serial number       : FDO164831LB
Model revision number           : K0
Motherboard revision number     : A0
Model number                    : WS-C3750X-48PF-S
Daughterboard assembly number   : 800-32727-03
Daughterboard serial number     : FDO16491JNK
System serial number            : FDO1649P24J
Top assembly part number        : 800-31324-07
Top assembly revision number    : B0
Version ID                      : V04
CLEI Code Number                : COMJZ00ARD
License Level                   : ipbase
License Type                    : Permanent
Next reboot licensing Level     : ipbase
Configuration register is 0xF
cs156005#

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