USB Loader failed

HI all
here's my syscheck

syscheck

sysCheck v2.0 by Double_A
...runs on IOS58 (rev 6175).

Region: NTSC-U
System Menu 4.1 (v449)
Hollywood v0x11
Console ID: 76171123
Boot2 v3

Found 64 titles.
Found 42 IOS on this console. 1 of them are stub.

IOS4 (rev 65280): Stub
IOS9 (rev 54321): Trucha Bug
IOS11 (rev 54321): Trucha Bug
IOS12 (rev 269): No Patches
IOS13 (rev 273): No Patches
IOS14 (rev 520): No Patches
IOS15 (rev 523): No Patches
IOS16 (rev 54321): Trucha Bug, ES Identify, Flash Access, NAND Access
IOS17 (rev 775): No Patches
IOS20 (rev 54321): Trucha Bug
IOS21 (rev 782): No Patches
IOS22 (rev 1037): No Patches
IOS28 (rev 1550): No Patches
IOS30 (rev 54321): Trucha Bug
IOS31 (rev 3608): No Patches
IOS33 (rev 3091): No Patches
IOS34 (rev 3348): No Patches
IOS35 (rev 3349): No Patches
IOS36 (rev 54321): Trucha Bug, ES Identify, NAND Access
IOS37 (rev 3869): No Patches
IOS38 (rev 4123): No Patches
IOS50 (rev 54321): Trucha Bug
IOS53 (rev 5406): No Patches
IOS55 (rev 5406): No Patches
IOS56 (rev 5662): No Patches
IOS57 (rev 5918): No Patches
IOS58 (rev 6175): No Patches
IOS60 (rev 54321): Trucha Bug
IOS61 (rev 5661): No Patches
IOS70 (rev 54321): Trucha Bug
IOS80 (rev 54321): Trucha Bug
IOS90 (rev 54321): Trucha Bug
IOS202 (rev 65535): Trucha Bug, NAND Access, USB 2.0
IOS222 (rev 4): Trucha Bug, ES Identify, NAND Access, USB 2.0
IOS223 (rev 4): Trucha Bug, ES Identify, NAND Access, USB 2.0
IOS224 (rev 65535): Trucha Bug, NAND Access, USB 2.0
IOS236 (rev 1): Trucha Bug, ES Identify, NAND Access
IOS247 (rev 20): Trucha Bug, NAND Access, USB 2.0
IOS248 (rev 20): Trucha Bug, NAND Access, USB 2.0
IOS249 (rev 19): Trucha Bug, ES Identify, NAND Access, USB 2.0
IOS250 (rev 65535): Trucha Bug, ES Identify, NAND Access, USB 2.0
IOS254 (rev 65281): BootMii
BC v2
MIOS v65535

Report generated on 2011/01/06.

USB devices:
1. WD 250 GB, PATA, with generic USB casing. //not shown in the compatibility list.
first try
partition 1: FAT32. contains:
\wbfs\SVME01.wbfs
\music\song.mp3 (to test with MPlayer CE).
partition 2: NTFS, my personal data.

second try:
partition 1: WBFS. contains:
SVME01.wbfs
partition 2: NTFS, my personal data.

2. IPOD 5G 30GB
partition: FAT 32. contains
\ipod folders
\wbfs\SVME01.wbfs

3. Kingston 512MB SD card, using Generic Card Reader.
first try:
partition: FAT32. contains
\wbfs\SVME01.wbfs

2nd try:
partition: WBFS. contains
SVME01.wbfs


I have tried the following USB loaders
1. USB Loader GX, latest
2. CFG USB Loader v62, IOS 249 and also 222
3. WiiFlow, latest ver

none of them can detect my USB device.
e.g - for device 1
1. CFG Loader hangs at 249[FRAG]
2. USB Loader GX hangs.
3. wiiflow hangs

for device 2 and device 3:
1. USB Loader GX display msg that it cant mount, or it is waiting for slow usb device.
2. CFG loader firstly hang at 249[FRAG], then when the device is disconnected, it went to screen showing waiting for device with 30 sec timeout. when the device is connected back, it stops counting, etc.

other observations:
1. when using MPLayer CE, it can detect music/media files in device 1-FAT32, and device 1-NTFS.
but cannot detect files in device 2 and device 3-FAT32 (unable to mount FAT32).



another qeustions.
my another SD card contains boot.dol and startup.elf in the root. when it is plugged when wii boots, it always go to cboot2 and load MMM. is it possible to bypass this even when the SDcard is always plugged in at startup? should i just delete startup.elf???

i'm very new in this. please advice.